Ludwig van Beethoven (/ˈlʊdvɪɡ væn ˈbeɪt(h)oʊvən/ (listen); German: [ˈluːtvɪç fan ˈbeːthoːfn̩] (listen); baptised 17 December 1770^[1] – 26 March 1827) was a German composer and pianist. A crucial figure in the transition between the classical and romantic eras in classical music, he remains one of the most recognized and influential musicians of this period, and is considered to be one of the greatest composers of all time.

Beethoven was born in Bonn, the capital of the Electorate of Cologne, and part of the Holy Roman Empire. He displayed his musical talents at an early age and was vigorously taught by his father Johann van Beethoven, and was later taught by composer and conductor Christian Gottlob Neefe. At age 21, he moved to Vienna and studied composition with Joseph Haydn. Beethoven then gained a reputation as a virtuoso pianist, and was soon courted by Prince Lichnowsky for compositions, which resulted in Opus 1 in 1795.

The piece was a great critical and commercial success, and was followed by Symphony No. 1 in 1800. This composition was distinguished for its frequent use of sforzandi, as well as sudden shifts in tonal centers that were uncommon for traditional symphonic form, and the prominent, more independent use of wind instruments.^[2] In 1801, he also gained notoriety for his six String Quartets and for the ballet The Creatures of Prometheus. During this period, his hearing began to deteriorate, but he continued to conduct, premiering his third and fifth symphonies in 1804 and 1808, respectively. His condition worsened to almost complete deafness by 1811, and he then gave up performing and appearing in public.

During this period of self exile, Beethoven composed many of his most admired works; his seventh symphony premiered in 1813, with its second movement, Allegretto, achieving widespread critical acclaim.^[3] He composed the piece Missa Solemnis for a number of years until it premiered 1824, which preceded his ninth symphony, with the latter gaining fame for being among the first examples of a choral symphony.^[4] In 1826, his fourteenth String Quartet was noted for having seven linked movements played without a break, and is considered the final major piece performed before his death a year later.

His career is conventionally divided into early, middle, and late periods; the "early" period is typically seen to last until 1802, the "middle" period from 1802 to 1812, and the "late" period from 1812 to his death in 1827. During his life, he composed nine symphonies; five piano concertos; one violin concerto; thirty-two piano sonatas; sixteen string quartets; two masses; and the opera Fidelio. Other works, like Für Elise, were discovered after his death, and are also considered historical musical achievements. Beethoven's legacy is characterized for his innovative compositions, namely through the combinations of vocals and instruments, and also for widening the scope of sonata, symphony, concerto, and quartet,^[5] while he is also noted for his troublesome relationship with his contemporaries.

Beethoven was the grandson of Ludwig van Beethoven (1712–1773), a musician from the town of Mechelen in the Austrian Duchy of Brabant (in what is now the Flemish region of Belgium) who had moved to Bonn at the age of 21.^[6][7] Ludwig was employed as a bass singer at the court of Clemens August, Archbishop-Elector of Cologne, eventually rising to become, in 1761, Kapellmeister (music director) and thereafter the pre-eminent musician in Bonn. The portrait he commissioned of himself towards the end of his life remained displayed in his grandson's rooms as a talisman of his musical heritage.^[8] Ludwig had one son, Johann (1740–1792), who worked as a tenor in the same musical establishment and gave keyboard and violin lessons to supplement his income.^[6] Johann married Maria Magdalena Keverich in 1767; she was the daughter of Johann Heinrich Keverich (1701–1751), who had been the head chef at the court of the Archbishopric of Trier.^[9]

Beethoven was born of this marriage in Bonn. There is no authentic record of the date of his birth; however, the registry of his baptism, in a Catholic service at the Parish of St. Regius on 17 December 1770, survives.^[10] As children of that era were traditionally baptised the day after birth in the Catholic Rhine country, and it is known that Beethoven's family and his teacher Johann Albrechtsberger celebrated his birthday on 16 December, most scholars accept 16 December 1770 as his date of birth.^[11][12] Of the seven children born to Johann van Beethoven, only Ludwig, the second-born, and two younger brothers survived infancy. Kaspar Anton Karl was born on 8 April 1774, and Nikolaus Johann, the youngest, was born on 2 October 1776.^[13]

Beethoven's first music teacher was his father. He later had other local teachers: the court organist Gilles van den Eeden (d. 1782), Tobias Friedrich Pfeiffer (a family friend, who provided keyboard tuition), and Franz Rovantini (a relative, who instructed him in playing the violin and viola).^[6] From the outset his tuition regime, which began in his fifth year, was harsh and intensive, often reducing him to tears; with the involvement of the insomniac Pfeiffer there were irregular late-night sessions with the young Beethoven being dragged from his bed to the keyboard.^[14] His musical talent was obvious at a young age. Johann, aware of Leopold Mozart's successes in this area (with his son Wolfgang and daughter Nannerl), attempted to promote his son as a child prodigy, claiming that Beethoven was six (he was seven) on the posters for his first public performance in March 1778.^[15]

Some time after 1779, Beethoven began his studies with his most important teacher in Bonn, Christian Gottlob Neefe, who was appointed the Court's Organist in that year.^[16] Neefe taught him composition, and by March 1783 had helped him write his first published composition: a set of keyboard variations (WoO 63).^[13] Beethoven soon began working with Neefe as assistant organist, at first unpaid (1781), and then as a paid employee (1784) of the court chapel conducted by the Kapellmeister Andrea Luchesi. His first three piano sonatas, named "Kurfürst" ("Elector") for their dedication to the Elector Maximilian Friedrich (1708–1784), were published in 1783. Maximilian Frederick noticed his talent early, and subsidised and encouraged the young man's musical studies.^[17]

Maximilian Frederick's successor as the Elector of Bonn was Maximilian Francis, the youngest son of Empress Maria Theresa of Austria, and he brought notable changes to Bonn. Echoing changes made in Vienna by his brother Joseph, he introduced reforms based on Enlightenment philosophy, with increased support for education and the arts. The teenage Beethoven was almost certainly influenced by these changes. He may also have been influenced at this time by ideas prominent in freemasonry, as Neefe and others around Beethoven were members of the local chapter of the Order of the Illuminati.^[18]

In December 1786, Beethoven travelled to Vienna, at his employer's expense, for the first time, apparently in the hope of studying with Mozart.^[19] The details of their relationship are uncertain, including whether they actually met.^[20] Having learned that his mother was ill, Beethoven returned quickly to Bonn in May 1787. His mother died shortly thereafter, and his father lapsed deeper into alcoholism. As a result, he became responsible for the care of his two younger brothers, and spent the next five years in Bonn.^[21]

He was introduced in these years to several people who became important in his life. Franz Wegeler, a young medical student, introduced him to the von Breuning family (one of whose daughters Wegeler eventually married). He often visited the von Breuning household, where he taught piano to some of the children. Here he encountered German and classical literature. The von Breuning family environment was less stressful than his own, which was increasingly dominated by his father's decline.^[22] He also came to the attention of Count Ferdinand von Waldstein, who became a lifelong friend and financial supporter.^[23]

In 1789 Beethoven obtained a legal order by which half of his father's salary was paid directly to him for support of the family.^[24] He also contributed further to the family's income by playing viola in the court orchestra. This familiarised him with a variety of operas, including three by Mozart that were performed at court in this period. He also befriended Anton Reicha, a flautist and violinist of about his own age who was a nephew of the court orchestra's conductor, Josef Reicha.^[25]

From 1790 to 1792, he composed a significant number of works (none were published at the time, and most are now listed as "WoO", works without opus number) that demonstrated his growing range and maturity. Musicologists have identified a theme similar to those of his Third Symphony in a set of variations written in 1791.^[26] It was probably on Neefe's recommendation that Beethoven received his first commissions; the municipal leaders in Bonn had commissioned cantatas to mark the occasion of the death in 1790 of Joseph II and the subsequent accession of Leopold II as Holy Roman Emperor. The two Emperor Cantatas (WoO 87, WoO 88) he scored were never performed at the time and they remained lost until the 1880s. But they were, according to Brahms, distinctively "Beethoven through and through" and as such prophetic of the tragic style which would mark his music as distinct from the classical tradition.^[27]

He was probably first introduced to Joseph Haydn in late 1790, when the latter was travelling to London and stopped in Bonn around Christmas time.^[28] A year and a half later, they met in Bonn on Haydn's return trip from London to Vienna in July 1792, when Beethoven played in the orchestra at the Redoute in Godesberg. It is likely that arrangements were made at that time for Beethoven to study with the old master.^[29]

With the Elector's help, he left Bonn for Vienna in November 1792, amid rumours of war spilling out of France; he learned shortly after his arrival that his father had died.^[30][31][32] Mozart had also recently died. Count Waldstein, in his farewell note to Beethoven, wrote: "Through uninterrupted diligence you will receive Mozart's spirit through Haydn's hands."^[32] Over the next few years, Beethoven responded to the widespread feeling that he was a successor to the recently deceased Mozart by studying that master's work and writing works with a distinctly Mozartean flavour.^[33]

He did not immediately set out to establish himself as a composer, but rather devoted himself to study and performance. Working under Haydn's direction,^[34] he sought to master counterpoint. He also studied violin under Ignaz Schuppanzigh.^[35] Early in this period, he also began receiving occasional instruction from Antonio Salieri, primarily in Italian vocal composition style; this relationship persisted until at least 1802, and possibly as late as 1809.^[36] With Haydn's departure for England in 1794, Beethoven was expected by the Elector to return home to Bonn. He chose instead to remain in Vienna, continuing his instruction in counterpoint with Johann Albrechtsberger and other teachers. In any case, by this time it must have seemed clear to his employer that Bonn would fall to the French, as it did in October 1794, effectively leaving Beethoven without a stipend or the necessity to return.^[37] However, a number of Viennese noblemen had already recognised his ability and offered him financial support, among them Prince Joseph Franz Lobkowitz, Prince Karl Lichnowsky, and Baron Gottfried van Swieten.^[38]

By 1793, he had established a reputation as an improviser in the salons of the nobility, often playing the preludes and fugues of J.S. Bach's Well-Tempered Clavier.^[39] His friend Nikolaus Simrock had begun publishing his compositions; the first are believed to be a set of variations (WoO 66).^[40] By 1793, he had established a reputation in Vienna as a piano virtuoso, but he apparently withheld works from publication so that their publication in 1795 would have greater impact.^[38] His first public performance in Vienna was in March 1795, a concert in which he first performed one of his piano concertos. It is uncertain whether this was the First or Second. Documentary evidence is unclear, and both concertos were in a similar state of near-completion (neither was completed or published for several years).^[41][42] Shortly after this performance, he arranged for the publication of the first of his compositions to which he assigned an opus number, the three piano trios, Opus 1. These works were dedicated to his patron Prince Lichnowsky,^[41] and were a financial success; Beethoven's profits were nearly sufficient to cover his living expenses for a year.^[43]

Beethoven composed his first six string quartets (Op. 18) between 1798 and 1800 (commissioned by, and dedicated to, Prince Lobkowitz). They were published in 1801. With premieres of his First and Second Symphonies in 1800 and 1803, he became regarded as one of the most important of a generation of young composers following Haydn and Mozart. He also continued to write in other forms, turning out widely known piano sonatas like the "Pathétique" sonata (Op. 13), which Cooper describes as "surpass[ing] any of his previous compositions, in strength of character, depth of emotion, level of originality, and ingenuity of motivic and tonal manipulation."^[44] He also completed his Septet (Op. 20) in 1799, which was one of his most popular works during his lifetime.

For the premiere of his First Symphony, he hired the Burgtheater on 2 April 1800, and staged an extensive programme of music, including works by Haydn and Mozart, as well as his Septet, the First Symphony, and one of his piano concertos (the latter three works all then unpublished). The concert, which the Allgemeine musikalische Zeitung described as "the most interesting concert in a long time," was not without difficulties; among the criticisms was that "the players did not bother to pay any attention to the soloist."^[45]

Mozart and Haydn were undeniable influences. For example, Beethoven's quintet for piano and winds is said to bear a strong resemblance to Mozart's work for the same configuration, albeit with his own distinctive touches.^[46] But his melodies, musical development, use of modulation and texture, and characterisation of emotion all set him apart from his influences, and heightened the impact some of his early works made when they were first published.^[47] By the end of 1800, Beethoven and his music were already much in demand from patrons and publishers.^[48]

In May 1799, he taught piano to the daughters of Hungarian Countess Anna Brunsvik. During this time, he fell in love with the younger daughter Josephine^[49] who has therefore been identified as one of the more likely candidates for the addressee of his letter to the "Immortal Beloved" (in 1812). Shortly after these lessons, Josephine was married to Count Josef Deym. Beethoven was a regular visitor at their house, continuing to teach Josephine, and playing at parties and concerts. Her marriage was by all accounts happy (despite initial financial problems),^[50] and the couple had four children. Her relationship with Beethoven intensified after Deym died suddenly in 1804.^[51]

He also had a few other students. From 1801 to 1805, he tutored Ferdinand Ries, who went on to become a composer and later wrote Beethoven remembered, a book about their encounters. The young Carl Czerny studied with Beethoven from 1801 to 1803. Czerny later became a renowned music teacher himself, instructing Franz Liszt, and on 11 February 1812 gave the Vienna premiere of Beethoven's fifth piano concerto (the "Emperor").^[52]

His compositions between 1800 and 1802 were dominated by two large-scale orchestral works, although he continued to produce other important works such as the piano sonata Sonata quasi una fantasia known as the "Moonlight Sonata". In the spring of 1801 he completed The Creatures of Prometheus, a ballet. The work received numerous performances in 1801 and 1802, and he rushed to publish a piano arrangement to capitalise on its early popularity.^[53] In the spring of 1802 he completed the Second Symphony, intended for performance at a concert that was cancelled. The symphony received its premiere instead at a subscription concert in April 1803 at the Theater an der Wien, where he had been appointed composer in residence. In addition to the Second Symphony, the concert also featured the First Symphony, the Third Piano Concerto, and the oratorio Christ on the Mount of Olives. Reviews were mixed, but the concert was a financial success; he was able to charge three times the cost of a typical concert ticket.^[54]

His business dealings with publishers also began to improve in 1802 when his brother Kaspar, who had previously assisted him casually, began to assume a larger role in the management of his affairs. In addition to negotiating higher prices for recently composed works, Kaspar also began selling some of his earlier unpublished compositions, and encouraged him (against Beethoven's preference) to also make arrangements and transcriptions of his more popular works for other instrument combinations. Beethoven acceded to these requests, as he could not prevent publishers from hiring others to do similar arrangements of his works.^[55]

Beethoven is reported to have dated his hearing loss from a fit he suffered in 1798 induced by a rage at the interruption of his work—having fallen over, he got up to find himself deaf. His hearing only ever partially recovered and, during its gradual decline, was impeded by a severe form of tinnitus.^[56] As early as 1801, he wrote to friends describing his symptoms and the difficulties they caused in both professional and social settings (although it is likely some of his close friends were already aware of the problems).^[57]

The cause of his deafness is unknown, but has variously been attributed to typhus, auto-immune disorders (such as systemic lupus erythematosus), and even his habit of immersing his head in cold water to stay awake.^[58] The explanation from his autopsy was that he had a "distended inner ear", which developed lesions over time. Paget's disease is another possible cause of his deafness.^[59]

On the advice of his doctor, he lived in the small Austrian town of Heiligenstadt, just outside Vienna, from April to October 1802 in an attempt to come to terms with his condition. There he wrote his Heiligenstadt Testament, a letter to his brothers which records his thoughts of suicide due to his growing deafness and records his resolution to continue living for and through his art.^[60] Over time, his hearing loss became profound: at the end of the premiere of his Ninth Symphony in 1824, he had to be turned around to see the tumultuous applause of the audience because he could hear neither it nor the orchestra. His hearing loss did not prevent him from composing music, but it made playing at concerts—a lucrative source of income—increasingly difficult. After a failed attempt in 1811 to perform his own Piano Concerto No. 5 (the "Emperor"), which was premiered by his student Carl Czerny, he never performed in public again until he directed the premiere performance of the Ninth Symphony in 1824, which involved him giving cues to conductor Michael Umlauf.^[61]

A large collection of his hearing aids, such as a special ear horn, can be viewed at the Beethoven House Museum in Bonn, Germany. Despite his obvious distress, Czerny remarked that Beethoven could still hear speech and music normally until 1812.^[62] Around 1814 however, by the age of 44, he was almost totally deaf, and when a group of visitors saw him play a loud arpeggio of thundering bass notes at his piano remarking, "Ist es nicht schön?" (Is it not beautiful?), they felt deep sympathy considering his courage and sense of humour (he lost the ability to hear higher frequencies first).^[63]

As a result of Beethoven's hearing loss, his conversation books are an unusually rich written resource. Used primarily in the last ten or so years of his life, his friends wrote in these books so that he could know what they were saying, and he then responded either orally or in the book. The books contain discussions about music and other matters, and give insights into his thinking; they are a source for investigations into how he intended his music should be performed, and also his perception of his relationship to art. Out of a total of 400 conversation books, it has been suggested by Alexander Wheelock Thayer that 264 were destroyed (and others were altered) after his death by his secretary Anton Schindler, who wished only an idealised biography of the composer to survive.^[64] However, Theodore Albrecht contests the verity of Schindler's destruction of a large number of conversation books.^[65]

While Beethoven earned income from publication of his works and from public performances, he also depended on the generosity of patrons for income, for whom he gave private performances and copies of works they commissioned for an exclusive period prior to their publication. Some of his early patrons, including Prince Lobkowitz and Prince Lichnowsky, gave him annual stipends in addition to commissioning works and purchasing published works.^[66]

Perhaps his most important aristocratic patron was Archduke Rudolph, the youngest son of Emperor Leopold II, who in 1803 or 1804 began to study piano and composition with him. The cleric (Cardinal-Priest) and the composer became friends, and their meetings continued until 1824.^[67] Beethoven dedicated 14 compositions to Rudolph, including the Archduke Trio (1811) and Missa solemnis (1823). Rudolph, in turn, dedicated one of his own compositions to Beethoven. The letters Beethoven wrote to Rudolph are today kept at the Gesellschaft der Musikfreunde in Vienna.^[68] Another patron was Count (later Prince) Andreas Razumovsky, for whom the String Quartets Nos. 7–9, Op. 59, Rasumovsky were named.

In the autumn of 1808, after having been rejected for a position at the royal theatre, he received an offer from Napoleon's brother Jérôme Bonaparte, then king of Westphalia, for a well-paid position as Kapellmeister at the court in Cassel. To persuade him to stay in Vienna, the Archduke Rudolph, Prince Kinsky and Prince Lobkowitz, after receiving representations from the composer's friends, pledged to pay him a pension of 4000 florins a year. Only Archduke Rudolph paid his share of the pension on the agreed date.^[69] Kinsky, immediately called to military duty, did not contribute and soon died after falling from his horse. Lobkowitz stopped paying in September 1811. No successors came forward to continue the patronage, and Beethoven relied mostly on selling composition rights and a small pension after 1815. The effects of these financial arrangements were undermined to some extent by war with France, which caused significant inflation when the government printed money to fund its war efforts.

Beethoven's middle period spanned from 1802 through 1812.^[70]

His return to Vienna from Heiligenstadt was marked by a change in musical style, and is now designated as the start of his middle or "heroic" period. According to Carl Czerny, Beethoven said, "I am not satisfied with the work I have done so far. From now on I intend to take a new way."^[71] This "heroic" phase was characterised by a large number of original works composed on a grand scale.^[72] The first major work employing this new style was the Third Symphony in E flat, known as the Eroica. This work was longer and larger in scope than any previous symphony. When it premiered in early 1805 it received a mixed reception. Some listeners objected to its length or misunderstood its structure, while others viewed it as a masterpiece.^[73]

The "middle period" is sometimes associated with a "heroic" manner of composing,^[74] but the use of the term "heroic" has become increasingly controversial in Beethoven scholarship. The term is more frequently used as an alternative name for the middle period.^[75] The appropriateness of the term "heroic" to describe the whole middle period has been questioned as well: while some works, like the Third and Fifth Symphonies, are easy to describe as "heroic", many others, like his Symphony No. 6, Pastoral, are not.^[76]

Some of the middle period works extend the musical language he had inherited from Haydn and Mozart. The middle period work includes the Third through Eighth Symphonies, the Rasumovsky, Harp and Serioso string quartets, the Waldstein and Appassionata piano sonatas, Christ on the Mount of Olives, the opera Fidelio, the Violin Concerto, and many other compositions. A minor work, his 1815 finale Es ist vollbracht, reflected the heroic style in an exaggerated fashion.^[77]

During this time his income came from publishing his works, from performances of them, and from his patrons. His position at the Theater an der Wien was terminated when the theatre changed management in early 1804, and he was forced to move temporarily to the suburbs of Vienna with his friend Stephan von Breuning. This slowed work on Fidelio, his largest work to date, for a time. It was delayed again by the Austrian censor, and finally premiered in November 1805 to houses that were nearly empty because of the French occupation of the city. In addition to being a financial failure, this version of Fidelio was also a critical failure, and Beethoven began revising it.^[78]

In May 1809, when the attacking forces of Napoleon bombarded Vienna, according to Ferdinand Ries, Beethoven, very worried that the noise would destroy what remained of his hearing, hid in the basement of his brother's house, covering his ears with pillows.^[79]

The work of the middle period established Beethoven as a master. In a review from 1810, he was enshrined by E. T. A. Hoffmann as one of the three great "Romantic" composers, along with Haydn and Mozart; Hoffmann called his Fifth Symphony "one of the most important works of the age".^[80]

Beethoven's love life was hampered by class issues. In late 1801, he met a young countess, Julie ("Giulietta") Guicciardi, through the Brunsvik family, at a time when he was giving regular piano lessons to Josephine Brunsvik. He mentions his love for Julie in a November 1801 letter to his boyhood friend, Franz Wegeler, but he could not consider marrying her, due to the class difference. He later dedicated his Sonata No. 14, now commonly known as the Moonlight sonata, to her.^[81]

His relationship with Josephine Brunsvik deepened after the death in 1804 of her aristocratic first husband, the Count Joseph Deym. He wrote Josephine 15 passionate love letters from late 1804 to around 1809/10. Although his feelings were obviously reciprocated, Josephine was forced by her family to withdraw from him in 1807. She cited her "duty" and the fact that she would have lost the custodianship of her aristocratic children had she married a commoner.^[82] After Josephine married Baron von Stackelberg in 1810, Beethoven may have proposed unsuccessfully to Therese Malfatti, the supposed dedicatee of "Für Elise";^[83][84] his status as a commoner may again have interfered with those plans.

In the spring of 1811 he became seriously ill, suffering headaches and high fever. On the advice of his doctor, he spent six weeks in the Bohemian spa town of Teplitz. The following winter, which was dominated by work on the Seventh symphony, he was again ill, and his doctor ordered him to spend the summer of 1812 at the spa Teplitz. It is certain that he was at Teplitz when he wrote a love letter to his "Immortal Beloved".^[85] The identity of the intended recipient has long been a subject of debate; candidates include Guicciardi, Malfatti, Brunsvik, Anna Maria Erdődy and Antonie Brentano.

He visited his brother Johann at the end of October 1812. He wished to end Johann's cohabitation with Therese Obermayer, a woman who already had an illegitimate child. He was unable to convince Johann to end the relationship and appealed to the local civic and religious authorities. Johann and Therese married on 9 November.^[86]

In early 1813 he apparently went through a difficult emotional period, and his compositional output dropped. His personal appearance degraded—it had generally been neat—as did his manners in public, especially when dining. He took care of his brother (who was suffering from tuberculosis) and his family, an expense that he claimed left him penniless.

Beethoven was finally motivated to begin significant composition again in June 1813, when news arrived of the defeat of one of Napoleon's armies at Vitoria, Spain, by a coalition of forces under the Duke of Wellington. This news stimulated him to write the battle symphony known as Wellington's Victory. It was first performed on 8 December, along with his Seventh Symphony, at a charity concert for victims of the war. The work was a popular hit, probably because of its programmatic style, which was entertaining and easy to understand. It received repeat performances at concerts he staged in January and February 1814. His renewed popularity led to demands for a revival of Fidelio, which, in its third revised version, was also well received at its July opening. That summer he composed a piano sonata for the first time in five years (No. 27, Opus 90). This work was in a markedly more Romantic style than his earlier sonatas. He was also one of many composers who produced music in a patriotic vein to entertain the many heads of state and diplomats who came to the Congress of Vienna that began in November 1814. His output of songs included his only song cycle, "An die ferne Geliebte," and the extraordinarily expressive second setting of the poem "An die Hoffnung" (Op. 94) in 1815. Compared to its first setting in 1805 (a gift for Josephine Brunsvik), it was "far more dramatic ... The entire spirit is that of an operatic scena."^[87]

Between 1815 and 1817 Beethoven's output dropped again. He attributed part of this to a lengthy illness (he called it an "inflammatory fever") that he had for more than a year, starting in October 1816.^[88] Biographers have speculated on a variety of other reasons that also contributed to the decline, including the difficulties in the personal lives of his would-be paramours and the harsh censorship policies of the Austrian government. The illness and death of his brother Kaspar from tuberculosis may also have played a role.

Kaspar had been ill for some time, and Beethoven spent a small fortune in 1815 on his care. After Kaspar died on 15 November 1815, Beethoven immediately became embroiled in a protracted legal dispute with Kaspar's wife Johanna over custody of their son Karl, then nine years old. Beethoven, who considered Johanna an unfit parent because of her morals (she had an illegitimate child by a different father before marrying Kaspar and had been convicted of theft) and financial management, had successfully applied to Kaspar to have himself named sole guardian of the boy. A late codicil to Kaspar's will gave him and Johanna joint guardianship. While Beethoven was successful at having his nephew removed from her custody in February 1816, the case was not fully resolved until 1820, and he was frequently preoccupied by the demands of the litigation and seeing to the welfare of Karl, whom he first placed in a private school.

The Austrian court system had one court for the nobility and members of the Landtafel, the Landrechte, and many other courts for commoners, among them the Civil Court of the Vienna Magistrate. Beethoven disguised the fact that the Dutch "van" in his name did not denote nobility as does the German "von"^[89] and his case was tried in the Landrechte. Owing to his influence with the court, Beethoven felt assured of the favourable outcome of being awarded sole guardianship. While giving evidence to the Landrechte, however, he was unable to prove being of noble birth^[89] and as a consequence, on 18 December 1818 the case was transferred to the Magistracy, where he lost sole guardianship.

He appealed and regained custody. Johanna's appeal to the Emperor was not successful: the Emperor "washed his hands of the matter". During the years of custody that followed, Beethoven attempted to ensure that Karl lived to the highest moral standards. Beethoven had an overbearing manner and frequently interfered in his nephew's life. Karl attempted suicide on 31 July 1826 by shooting himself in the head. He survived and was brought to his mother's house, where he recuperated. He and Beethoven were reconciled, but Karl insisted on joining the army and last saw Beethoven in January 1827.^[90]

Beethoven's late period spanned from 1812 to his death in 1827.^[70]

He began a renewed study of older music, including works by Johann Sebastian Bach and George Frideric Handel, that were then being published in the first attempts at complete editions. He composed the overture The Consecration of the House, which was the first work to attempt to incorporate these influences. A new style emerged, now called his "late period". He returned to the keyboard to compose his first piano sonatas in almost a decade: the works of the late period include the last five piano sonatas and the Diabelli Variations, the last two sonatas for cello and piano, the late string quartets (see below), and two works for very large forces: the Missa Solemnis and the Ninth Symphony.

By early 1818 his health had improved, and his nephew moved in with him in January. On the downside, his hearing had deteriorated to the point that conversation became difficult, necessitating the use of conversation books. His household management had also improved somewhat; Nanette Streicher, who had assisted in his care during his illness, continued to provide some support, and he finally found a skilled cook.^[91] His musical output in 1818 was still somewhat reduced, but included song collections and the "Hammerklavier" Sonata, as well as sketches for two symphonies that eventually coalesced into the epic Ninth. In 1819 he was again preoccupied by the legal processes around Karl, and began work on the Diabelli Variations and the Missa Solemnis.

For the next few years he continued to work on the Missa, composing piano sonatas and bagatelles to satisfy the demands of publishers and the need for income, and completing the Diabelli Variations. He was ill again for an extended time in 1821, and completed the Missa in 1823, three years after its original due date. He also opened discussions with his publishers over the possibility of producing a complete edition of his work, an idea that was arguably not fully realised until 1971. His brother Johann began to take a hand in his business affairs, much in the way Kaspar had earlier, locating older unpublished works to offer for publication and offering the Missa to multiple publishers with the goal of getting a higher price for it.

Two commissions in 1822 improved his financial prospects. The Philharmonic Society of London offered a commission for a symphony, and Prince Nikolas Golitsin of St. Petersburg offered to pay Beethoven's price for three string quartets. The first of these commissions spurred him to finish the Ninth Symphony, which was first performed, along with the Missa Solemnis, on 7 May 1824, to great acclaim at the Kärntnertortheater. The Allgemeine musikalische Zeitung gushed, "inexhaustible genius had shown us a new world", and Carl Czerny wrote that his symphony "breathes such a fresh, lively, indeed youthful spirit ... so much power, innovation, and beauty as ever [came] from the head of this original man, although he certainly sometimes led the old wigs to shake their heads." Unlike his more lucrative earlier concerts, this did not make him much money, as the expenses of mounting it were significantly higher.^[92] A second concert on 24 May, in which the producer guaranteed him a minimum fee, was poorly attended; nephew Karl noted that "many people [had] already gone into the country". It was Beethoven's last public concert.^[93]

Beethoven then turned to writing the string quartets for Golitsin. This series of quartets, known as the "Late Quartets," went far beyond what musicians or audiences were ready for at that time. One musician commented that "we know there is something there, but we do not know what it is." Composer Louis Spohr called them "indecipherable, uncorrected horrors." Opinion has changed considerably from the time of their first bewildered reception: their forms and ideas inspired musicians and composers including Richard Wagner and Béla Bartók, and continue to do so. Of the late quartets, Beethoven's favourite was the Fourteenth Quartet, op. 131 in C♯ minor, which he rated as his most perfect single work.^[94] The last musical wish of Schubert was to hear the Op. 131 quartet, which he did on 14 November 1828, five days before his death.^[95]

He wrote the last quartets amidst failing health. In April 1825 he was bedridden, and remained ill for about a month. The illness—or more precisely, his recovery from it—is remembered for having given rise to the deeply felt slow movement of the Fifteenth Quartet, which he called "Holy song of thanks ('Heiliger Dankgesang') to the divinity, from one made well." He went on to complete the quartets now numbered Thirteenth, Fourteenth, and Sixteenth. The last work completed by Beethoven was the substitute final movement of the Thirteenth Quartet, which replaced the difficult Große Fuge. Shortly thereafter, in December 1826, illness struck again, with episodes of vomiting and diarrhoea that nearly ended his life.

In 1825, his nine symphonies were performed in a cycle for the first time, by the Leipzig Gewandhaus Orchestra under Johann Philipp Christian Schulz. This was repeated in 1826.^[96][97]

Beethoven was bedridden for most of his remaining months, and many friends came to visit. He died on 26 March 1827 at the age of 56 during a thunderstorm. His friend Anselm Hüttenbrenner, who was present at the time, said that there was a peal of thunder at the moment of death. An autopsy revealed significant liver damage, which may have been due to heavy alcohol consumption.^[98] It also revealed considerable dilation of the auditory and other related nerves.^[99]

Beethoven's funeral procession on 29 March 1827 was attended by an estimated 20,000 people. Franz Schubert, who died the following year and was buried next to him, was one of the torchbearers. He was buried in a dedicated grave in the Währing cemetery, north-west of Vienna, after a requiem mass at the church of the Holy Trinity (Dreifaltigkeitskirche). His remains were exhumed for study in 1862, and moved in 1888 to Vienna's Zentralfriedhof.^[98] In 2012, his crypt was checked to see if his teeth had been stolen during a series of grave robberies of other famous Viennese composers.^[100]

There is dispute about the cause of his death: alcoholic cirrhosis, syphilis, infectious hepatitis, lead poisoning, sarcoidosis and Whipple's disease have all been proposed.^[101] Friends and visitors before and after his death clipped locks of his hair, some of which have been preserved and subjected to additional analysis, as have skull fragments removed during the 1862 exhumation.^[102] Some of these analyses have led to controversial assertions that he was accidentally poisoned to death by excessive doses of lead-based treatments administered under instruction from his doctor.^{[103][104][105]}

Beethoven is acknowledged to be one of the giants of classical music. Together with Bach and Johannes Brahms, he is referred to as one of the "three Bs" who epitomize that tradition. He was a pivotal figure in the transition from the 18th century musical classicism to 19th century romanticism, and his influence on subsequent generations of composers was profound.^[106] His music features twice on the Voyager Golden Record, a phonograph record containing a broad sample of the images, common sounds, languages, and music of Earth, sent into outer space with the two Voyager probes.^[107]

Beethoven composed in several musical genres and for a variety of instrument combinations. His works for symphony orchestra include nine symphonies (of which the Ninth Symphony includes a chorus), and about a dozen pieces of "occasional" music. He wrote seven concerti for one or more soloists and orchestra, as well as four shorter works that include soloists accompanied by orchestra. His only opera is Fidelio; other vocal works with orchestral accompaniment include two masses and a number of shorter works.

His large body of compositions for piano includes 32 piano sonatas and numerous shorter pieces, including arrangements of some of his other works. Works with piano accompaniment include 10 violin sonatas, 5 cello sonatas, and a sonata for French horn, as well as numerous lieder.

He also wrote a significant quantity of chamber music. In addition to 16 string quartets, he wrote five works for string quintet, seven for piano trio, five for string trio, and more than a dozen works for various combinations of wind instruments.

Beethoven's career as a composer is conventionally divided into early, middle, and late periods. The "early" period is typically seen to last until 1802, the "middle" period from 1802 to 1812, and the "late" period thereafter. This distinction was first introduced in 1828, just one year after his death, and while often challenged and refined it remains a starting point to understand the development of Beethoven's work.^[108]

Beethoven's early years in Bonn arguably represent a further, preliminary, period. His earliest known composition was from 1782, and a total of 40 pieces by him dating from 1792 or earlier are known today (though mainly from much later sources). Today his best-known works from before 1790 are three piano quartets and three piano sonatas, the quartets being closely modelled on Mozart's sonatas for piano and violin. From 1790 to 1802, his best music can be found in a cantata and a number of concert arias, and in some variations for solo piano, while his instrumental music (including movements of symphonies and a violin concerto, as well as various fragmentary chamber works) is conservative and uninspired.^[109]

The conventional "first period" begins after Beethoven's arrival in Vienna in 1792. In the first few years he seems to have composed less than he did at Bonn, and his Piano Trios, op.1 were not published until 1795. From this point onward, he had mastered the 'Viennese style' (best known today from Haydn and Mozart) and was making the style his own. His works from 1795 to 1800 are larger in scale than was the norm (writing sonatas in four movements, not three, for instance); typically he uses a scherzo rather than a minuet and trio; and his music often includes dramatic, even sometimes over-the-top, uses of extreme dynamics and tempi and chromatic harmony. It was this that led Haydn to believe the third trio of Op.1 was too difficult for an audience to appreciate.^[110]

He also explored new directions and gradually expanded the scope and ambition of his work. Some important pieces from the early period are the first and second symphonies, the set of six string quartets Opus 18, the first two piano concertos, and the first dozen or so piano sonatas, including the famous Pathétique sonata, Op. 13.

His middle (heroic) period began shortly after the personal crisis brought on by his recognition of encroaching deafness. It includes large-scale works that express heroism and struggle. Middle-period works include six symphonies (Nos. 3–8), the last two piano concertos, the Triple Concerto and violin concerto, five string quartets (Nos. 7–11), several piano sonatas (including the Waldstein and Appassionata sonatas), the Kreutzer violin sonata and his only opera, Fidelio.

Beethoven's late period began around 1815. Works from this period are characterised by their intellectual depth, their formal innovations, and their intense, highly personal expression. The String Quartet, Op. 131 has seven linked movements, and the Ninth Symphony adds choral forces to the orchestra in the last movement.^[106] Other compositions from this period include the Missa solemnis, the last five string quartets (including the massive Große Fuge) and the last five piano sonatas.

Beethoven's life was troubled by his encroaching loss of hearing and chronic abdominal pain since his twenties. He contemplated suicide as documented in his Heiligenstadt Testament. He was often irascible. Nevertheless, he had a close and devoted circle of friends all his life, thought to have been attracted by his strength of personality. Towards the end of his life, his friends competed in their efforts to help him cope with his incapacities.^[106]

Sources show his disdain for authority and for social rank. He stopped performing at the piano if the audience chatted amongst themselves, or afforded him less than their full attention. At soirées, he refused to perform if suddenly called upon to do so. Eventually, after many confrontations, the Archduke Rudolph decreed that the usual rules of court etiquette did not apply to Beethoven.^[106]

He was attracted to the ideals of the Age of Enlightenment. In 1804, when Napoleon's imperial ambitions became clear, Beethoven took hold of the title page of his Third Symphony and scratched the name Bonaparte out so violently that he made a hole in the paper. He later changed the work's title to "Sinfonia Eroica, composta per festeggiare il sovvenire d'un grand'uom" ("Heroic Symphony, composed to celebrate the memory of a great man"), and he rededicated it to his patron, Prince Joseph Franz von Lobkowitz, at whose palace it was first performed.^[111]

The fourth movement of his Ninth Symphony features an elaborate choral setting of Schiller's Ode An die Freude ("Ode to Joy"), an optimistic hymn championing the brotherhood of humanity. In "Beethoven and Shakespeare: Ghosts and Heroes", David Roberts writes about the similarities between Beethoven's personality and Shakespeare's personality. The two men are known to be artistic colleagues, though from different ages in history, for their belief that their own understanding and rethinking of output which their own works entail can never come to a satisfactory end. Both were characterized by invention and reinvention. The expansion of their imaginative journeys had a propensity for joining comedy and tragedy, doing cogitation between rightness and strangeness, as they transcended their own selves in art, whereby nature had clear influences on them and on their works.^[112]

The Beethoven Monument in Bonn was unveiled in August 1845, in honour of his 75th anniversary. It was the first statue of a composer created in Germany, and the music festival that accompanied the unveiling was the impetus for the very hasty construction of the original Beethovenhalle in Bonn (it was designed and built within less than a month, on the urging of Franz Liszt). A statue to Mozart had been unveiled in Salzburg, Austria in 1842. Vienna did not honour Beethoven with a statue until 1880.^[113] His is the only name inscribed on one of the plaques that trim Symphony Hall, Boston; the others were left empty because it was felt that only Beethoven's popularity would endure.^[114]

There is a museum, the Beethoven House, the place of his birth, in central Bonn. The same city has hosted a musical festival, the Beethovenfest, since 1845. The festival was initially irregular but has been organised annually since 2007.

The Ira F. Brilliant Center for Beethoven Studies serves as a museum, research center, and host of lectures and performances devoted solely to this life and works.

The third largest crater on Mercury is named in his honour, as is the main-belt asteroid 1815 Beethoven.