The City Municipality of Bremen (/ˈbreɪmən/, also US: /ˈbrɛmən/;^[3][4][5] German: Stadtgemeinde Bremen, IPA: [ˈʃtatɡəˌmaɪndə ˈbʁeːmən] (listen); Low German also: Breem or Bräm) is the capital of the German federal state Free Hanseatic City of Bremen (also called just "Bremen" for short), a two-city-state consisting of the cities of Bremen and Bremerhaven. With around 570,000 inhabitants, the Hanseatic city is the 11th largest city of Germany as well as the second largest city of Northern Germany after Hamburg.

Bremen is the largest city on the River Weser, the longest river flowing entirely in Germany, lying some 60 km (37 mi) upstream from its mouth into the North Sea, and is surrounded by the state of Lower Saxony. A commercial and industrial city, Bremen is, together with Oldenburg and Bremerhaven, part of the Bremen/Oldenburg Metropolitan Region, with 2.5 million people. Bremen is contiguous with the Lower Saxon towns of Delmenhorst, Stuhr, Achim, Weyhe, Schwanewede and Lilienthal. There is an exclave of Bremen in Bremerhaven, the "Citybremian Overseas Port Area Bremerhaven" (Stadtbremisches Überseehafengebiet Bremerhaven). Bremen is the fourth largest city in the Low German dialect area after Hamburg, Dortmund and Essen.

Bremen's port, together with the port of Bremerhaven at the mouth of the Weser, is the second largest port in Germany after the Port of Hamburg. The airport of Bremen (Flughafen Bremen "Hans Koschnick") lies in the southern borough of Neustadt-Neuenland and is Germany's 12th busiest airport.

Bremen is a major cultural and economic hub of Northern Germany. The city is home to dozens of historical galleries and museums, ranging from historical sculptures to major art museums, such as the Bremen Overseas Museum (Übersee-Museum Bremen).^[6] The Bremen City Hall and the Bremen Roland are UNESCO World Heritage Sites. Bremen is well known through the Brothers Grimm's fairy tale "Town Musicians of Bremen" (Die Bremer Stadtmusikanten), and there is a statue dedicated to it in front of the city hall.

Bremen has a reputation as a working-class city.^[7] The city is home to many multinational companies and manufacturing centers. Companies headquartered in Bremen include the Hachez chocolate company and Vector Foiltec.^[8] Bremen's best known football club is Bundesliga club SV Werder Bremen, who play in the Weser Stadium (Weserstadion), that sits directly on the bank of the Weser.

The marshes and moraines near Bremen have been settled since about 12,000 BC. Burial places and settlements in Bremen-Mahndorf and Bremen-Osterholz date back to the 7th century AD. Since the Renaissance, some scientists have believed that the entry Fabiranum or Phabiranon in Ptolemy's Fourth Map of Europe,^[9] written in AD 150, refers to Bremen. But Ptolemy gives geographic coordinates, and these refer to a site northeast of the mouth of the river Visurgis (Weser). In Ptolemy's time the Chauci lived in the area now called north-western Germany or Lower Saxony. By the end of the 3rd century, they had merged with the Saxons. During the Saxon Wars (772–804) the Saxons, led by Widukind, fought against the West Germanic Franks, the founders of the Carolingian Empire, and lost the war.

Charlemagne, the King of the Franks, made a new law, the Lex Saxonum, which forbade the Saxons from worshipping Odin (the god of the Saxons); instead they had to convert to Christianity on pain of death. In 787 Willehad of Bremen became the first Bishop of Bremen. In 848 the archdiocese of Hamburg merged with the diocese of Bremen to become Hamburg-Bremen Archdiocese, with its seat in Bremen, and in the following centuries the archbishops of Hamburg-Bremen were the driving force behind the Christianisation of Northern Germany. In 888, at the behest of Archbishop Rimbert, Kaiser Arnulf of Carinthia, the Carolingian King of East Francia, granted Bremen the rights to hold its own markets, mint its own coins and make its own customs laws.

The city's first stone walls were built in 1032. Around that time trade with Norway, England and the northern Netherlands began to grow, thus increasing the importance of the city.

In 1186 the Bremian Prince-Archbishop Hartwig of Uthlede and his bailiff in Bremen confirmed – without generally waiving the prince-archbishop's overlordship over the city – the Gelnhausen Privilege, by which Frederick I Barbarossa granted the city considerable privileges. The city was recognised as a political entity with its own laws. Property within the municipal boundaries could not be subjected to feudal overlordship; this also applied to serfs who acquired property, if they lived in the city for a year and a day, after which they were to be regarded as free persons. Property was to be freely inherited without feudal claims for reversion to its original owner. This privilege laid the foundation for Bremen's later status of imperial immediacy (Free Imperial City).

The tax obligations of city to the prince-archbishopric were both a burden and a lever of influence. The city participated in the Diets of the neighbouring Prince-Archbishopric of Bremen as part of the Bremian Estates; in the context of the Landtag the city could offer or withhold its consent on tax levies proposed by the prince-archbishop in his governance of the region. Since the city was the principal taxpayer, its consent for taxes was generally sought. In this way the city wielded fiscal and political power within the Prince-Archbishopric, while not allowing the Prince-Archbishopric to rule in the city against its consent. In 1260 Bremen joined the Hanseatic League.

In 1350, the number of inhabitants reached 20,000. Around this time the Hansekogge (cog ship) became a unique product of Bremen.

In 1362, representatives of Bremen rendered homage to Albert II, Prince-Archbishop of Bremen in Langwedel. In return, Albert confirmed the city's privileges and brokered a peace between the city and Gerhard III, Count of Hoya, who since 1358 had held some burghers of Bremen in captivity. The city had to bail them out. In 1365 an extra tax, levied to finance the ransom, caused an uprising among the burghers and artisans that was put down by the city council after much bloodshed.

In 1366, Albert II tried to take advantage of the dispute between Bremen's city council and the guilds, whose members had expelled some city councillors from the city. When these councillors appealed to Albert II for help, many artisans and burghers regarded this as a treasonous act, fearing that this appeal to the prince would only provoke him to abolish the autonomy of the city.

The fortified city maintained its own guards, not allowing soldiers of the Prince-Archbishop to enter it. The city reserved an extra very narrow gate, the so-called Bishop's Needle (Latin: Acus episcopi, first mentioned in 1274), for all clergy, including the Prince-Archbishop. The narrowness of the gate made it physically impossible for him to enter surrounded by his knights.

Nevertheless, on the night of 29 May 1366, Albert's troops, helped by some burghers, invaded the city. Afterward, the city had to again render him homage: the Bremen Roland, symbol of the city's autonomy, was destroyed; and a new city council was appointed. In return, the new council granted Albert a credit amounting to the then-enormous sum of 20,000 Bremen marks.

But city councillors of the previous council, who had fled to the County of Oldenburg, gained the support of the counts and recaptured the city on June 27, 1366. The members of the intermediate council were regarded as traitors and beheaded, and the city de facto regained its autonomy. Thereupon, the city of Bremen, which had for a long time held an autonomous status, acted almost completely independent of the Prince-Archbishop. Albert failed to obtain control over the city of Bremen a second time, since he was always short of money and lacked the support of his family, the Welfs, who were preparing for and fighting the Lüneburg War of Succession (1370–88).

By the end of the 1360s Bremen had provided credit to Albert II to finance his lavish lifestyle, and gained in return the fortress of Vörde along with the dues levied in its bailiwick as guarantee for the credit. In 1369 Bremen again lent money to Albert II against the collateral of his mint, which was from then on run by the city council, which took over his right to mint coins. In 1377 Bremen purchased from Duke Frederick I of Brunswick-Lüneburg many of the Prince-Archbishop's castles, which Albert had pledged as security for a loan to Frederick's predecessor. Thus Bremen gained a powerful position in the Prince-Archbishopric (ecclesiastical principality), in effect sidelining its actual ruler.

The declining knightly family of Bederkesa had become deeply indebted,^{[10] []} and, having already sold many of their possessions, had even pawned half their say in the Bailiwick of Bederkesa (Amt Bederkesa) to the aspiring Mandelsloh family (a noble house, or Adelsgeschlecht). They lost the rest of their claims to the city of Bremen, when in 1381 its troops prevented the three Mandelsloh brothers from lending them to Albert II as territorial power.^{[10] []} The Mandelslohs and other robber barons from the Prince-Bishopric of Verden and the Prince-Archbishopric of Bremen ravaged burghers of the city of Bremen as well as inhabitants throughout the Prince-Archbishopric.

In 1381 the city's troops successfully ended the brigandage and captured the Castle of Bederkesa and its bailiwick. Thus Bremen gained a foothold to uphold peace and order in its forecourt on the lower course of the Weser. In 1386 the city of Bremen became the liege lord of the noble families holding the estates of Altluneburg and Elmlohe, who had previously been vassals of the Knights of Bederkesa. The city replaced in 1404 the old wooden statue of Roland, which had been destroyed in 1366 by the Bederkesa, with a larger limestone model; this statue has managed to survive six centuries and two World Wars into the 21st.

In 1411 the jointly ruling dukes of Saxe-Lauenburg, Eric IV and his sons Eric V and John IV, pawned their share in the Bederkesa bailiwick and castle to the Senate of Bremen, including all "they have in the jurisdictions in the Frisian Land of Wursten and in Lehe (Bremerhaven), which belongs to the aforementioned castle and Vogtei".^[11] Their share in jurisdiction, Vogtei (bailiwick) and castle had been acquired from the plague-stricken Knights of Bederkesa.^[11] In 1421, Bremen acquired also the remaining half of the rights of the Bederkesa knights, including their remaining share in Bederkesa Castle.^{[10] []}

During the 1440s, Bremen was often in conflict with the Dutch states. The city began offering contracts to pirates to attack its enemies, and it became a regional hub of piracy. These pirates targeted foreign shipping around the North Sea and captured numerous vessels. One notorious captain, known as Grote Gherd ("Big Gerry"), captured 13 ships from Flanders in a single expedition.^[12][13][14]

In 1648 the Prince-Archbishopric was transformed into the Duchy of Bremen, which was first ruled in personal union by the Swedish Crown. In November 1654, after the Second Bremian War, Bremen had to cede Bederkesa and the settlement of Lehe to the Duchy of Bremen (Treaty of Stade, 1654).

When the Protestant Reformation swept through Northern Germany, St Peter's cathedral belonged to the cathedral immunity district (German: Domfreiheit; cf. also Liberty), an extraterritorial enclave of the neighbouring Prince-Archbishopric of Bremen. In 1532, the cathedral chapter which was still Catholic at that time closed St Peter's after a mob consisting of Bremen's burghers had forcefully interrupted a Catholic Mass and prompted a pastor to hold a Lutheran service.

In 1547, the chapter, which had in the meantime become predominantly Lutheran, appointed the Dutch Albert Rizaeus, called Hardenberg, as the first Cathedral pastor of Protestant affiliation. Rizaeus turned out to be a partisan of the Zwinglian understanding of the Lord's Supper, which was rejected by the then Lutheran majority of burghers, the city council, and chapter. So in 1561 – after heated disputes – Rizaeus was dismissed and banned from the city and the cathedral again closed its doors.

However, as a consequence of that controversy the majority of Bremen's burghers and city council adopted Calvinism by the 1590s, while the chapter, which was at the same time the body of secular government in the neighbouring Prince-Archbishopric, clung to Lutheranism. This antagonism between a Calvinistic majority and a Lutheran minority, though it had a powerful position in its immunity district (mediatised as part of the city in 1803), remained dominant until in 1873 the Calvinist and Lutheran congregations of Bremen were reconciled and founded a united administrative umbrella Bremen Protestant Church, which still exists today, comprising the bulk of Bremen's burghers.

At the beginning of the 17th century, Bremen continued to play its double role, wielding fiscal and political power within the Prince-Archbishopric, but not allowing the Prince-Archbishopric to rule in the city without its consent.

Soon after the beginning of the Thirty Years' War Bremen declared its neutrality, as did most of the territories in the Lower Saxon Circle. John Frederick, Lutheran Administrator of the Prince-Archbishopric of Bremen, desperately tried to keep his Prince-Archbishopric out of the war, with the complete agreement of the Estates and the city of Bremen. When in 1623 the Republic of the Seven United Netherlands, which was fighting in the Eighty Years' War for its independence against Habsburg's Spanish and imperial forces, requested its Calvinist co-religionist Bremen to join them, the city refused, but started to reinforce its fortifications.

In 1623 the territories comprising the Lower Saxon Circle decided to recruit an army in order to maintain an armed neutrality, since troops of the Catholic League were already operating in the neighbouring Lower Rhenish-Westphalian Circle and dangerously close to their region. The concomitant effects of the war, debasement of the currency and rising prices, had already caused inflation which was also felt in Bremen.

In 1623 the Republic of the Seven United Netherlands, diplomatically supported by King James I of England, the brother-in-law of Christian IV of Denmark, started a new anti-Habsburg campaign. Thus the troops of the Catholic League were otherwise occupied and Bremen seemed relieved. But soon after this the imperial troops under Albrecht von Wallenstein headed north in an attempt to destroy the fading Hanseatic League, in order to reduce the Hanseatic cities of Bremen, Hamburg and the Lübeck and to establish a Baltic trade monopoly, to be run by some imperial favourites including Spaniards and Poles. The idea was to win Sweden's and Denmark's support, both of which had for a long time sought the destruction of the Hanseatic League.

In May 1625, Duke Christian IV of Holstein was elected – in the latter of his functions – by the Lower Saxon Circle's member territories commander-in-chief of the Lower Saxon troops. In the same year Christian IV joined the Anglo-Dutch military coalition. Christian IV ordered his troops to capture all the important traffic hubs in the Prince-Archbishopric and commenced the Battle of Lutter am Barenberge, on 27 August 1626, where he was defeated by the Leaguist troops under Johan 't Serclaes, Count of Tilly. Christian IV and his surviving troops fled to the Prince-Archbishopric and established their headquarters in Stade.

In 1627 Christian IV withdrew from the Prince-Archbishopric, in order to oppose Wallenstein's invasion of his Duchy of Holstein. Tilly then invaded the Prince-Archbishopric and captured its southern part. Bremen shut its city gates and entrenched itself behind its improved fortifications. In 1628, Tilly turned on the city, and Bremen paid him a ransom of 10,000 rixdollars in order to spare it a siege. The city remained unoccupied throughout the war.

The takeover by the Catholic League enabled Ferdinand II, Holy Roman Emperor, to implement the Edict of Restitution, decreed March 6, 1629, within the Prince-Archbishopric of Bremen including the city of Bremen. In September 1629 Francis William of Wartenberg, appointed by Ferdinand II as chairman of the imperial restitution commission for the Lower Saxon Circle, in carrying out the provisions of the Edict of Restitution, ordered the Bremian Chapter, seated in Bremen, to render an account of all the capitular and prince-archiepiscopal estates (not to be confused with the Estates). The Chapter refused, arguing first that the order had not been authorised and later that due to disputes with Bremen's city council, they could not freely travel to render an account, let alone do the necessary research on the estates. The anti-Catholic attitudes of Bremen's burghers and council was to make it completely impossible to prepare the restitution of estates from the Lutheran Chapter to the Roman Catholic Church. Even Lutheran capitulars were uneasy in Calvinistic Bremen.

Bremen's city council ordered that the capitular and prince-archiepiscopal estates within the boundaries of the unoccupied city were not to be restituted to the Catholic Church. The council argued that the city had long been Protestant, but the restitution commission replied that the city was de jure a part of the Prince-Archbishopric, so Protestantism had illegitimately taken over Catholic-owned estates. The city council replied that under these circumstances it would rather separate from the Holy Roman Empire and join the quasi-independent Republic of the Seven Netherlands.^[15] The city was neither to be conquered nor to be successfully besieged due to its new fortifications and its access to the North Sea.

In October 1631 an army, newly recruited by John Frederick, started to reconquer the Prince-Archbishopric — helped by forces from Sweden and the city of Bremen. John Frederick returned to office, only to implement the supremacy of Sweden, insisting that it retain supreme command until the end of the war. With the impending enforcement of the military Major Power of Sweden over the Prince-Archbishopric of Bremen, which was under negotiation at the Treaty of Westphalia, the city of Bremen feared it would fall under Swedish rule too. Therefore, the city appealed for an imperial confirmation of its status of imperial immediacy from 1186 (Gelnhausen Privilege). In 1646 Ferdinand III, Holy Roman Emperor, granted the requested confirmation (Diploma of Linz) to the Free Imperial City.

Nevertheless, Sweden, represented by its imperial fief Bremen-Verden, which comprised the secularised prince-bishoprics of Bremen and Verden, did not accept the imperial immediacy of the city of Bremen. Swedish Bremen-Verden tried to remediatise the Free Imperial City of Bremen (i.e., to make it switch its allegiance to Sweden). With this in view, Swedish Bremen-Verden twice waged war on Bremen. In 1381 the city of Bremen had imposed de facto rule in an area around Bederkesa and west of it as far as the lower branch of the Weser near Bremerlehe (a part of present-day Bremerhaven). Early in 1653, Bremen-Verden's Swedish troops captured Bremerlehe by force. In February 1654 the city of Bremen managed to get Ferdinand III, Holy Roman Emperor, to grant it a seat and the vote in the Holy Roman Empire's Diet, thus accepting the city's status as Free Imperial City of Bremen.

Ferdinand III demanded that Christina of Sweden, Duchess regnant of Bremen-Verden, compensate the city of Bremen for the damages caused and restitute Bremerlehe. When in March 1654 the city of Bremen started to recruit soldiers in the area of Bederkesa, in order to prepare for further arbitrary acts, Swedish Bremen-Verden enacted the First Bremian War (March to July 1654), arguing that it was acting in self-defence. The Free Imperial City of Bremen had meanwhile urged Ferdinand III to support it, who in July 1654 asked Charles X Gustav of Sweden, Christina's successor as Duke of Bremen-Verden, to cease the conflict, which resulted in the First Stade Recess (November 1654). This treaty left the main issue, the acceptance of the city of Bremen's imperial immediacy, unresolved. But the city agreed to pay tribute and levy taxes in favour of Swedish Bremen-Verden and to cede its possessions around Bederkesa and Bremerlehe, which was why it was later called Lehe.

In December 1660 the city council of Bremen rendered homage as Free Imperial City of Bremen to Leopold I, Holy Roman Emperor. In 1663 the city gained a seat and a vote in the Imperial Diet, despite sharp protest from Swedish Bremen-Verden. In March 1664 the Swedish Diet came out in favour of waging war on the Free Imperial City of Bremen. Right after Leopold I, who was busy with wars against the Ottoman Empire, had enfeoffed the minor King Charles XI of Sweden with Bremen-Verden, while the neighbouring Brunswick and Lunenburg-Celle was occupied by succession quarrels and France not opposed, Sweden started the Second Bremian War (1665–66) from its Bremen-Verden fief.

The Swedes under Carl Gustaf Wrangel laid siege to the city of Bremen. The siege brought Brandenburg-Prussia, Brunswick and Lunenburg-Celle, Denmark, Leopold I and the Netherlands onto the scene, who were all in favour of the city, with Brandenburgian, Cellean, Danish, and Dutch troops at Bremen-Verden's borders ready to invade. So on 15 November 1666 Sweden had to sign the Treaty of Habenhausen, obliging it to destroy the fortresses built close to Bremen and banning Bremen from sending its representative to the Diet of the Lower Saxon Circle. From then on no further Swedish attempts were made to capture the city.

In 1700 Bremen introduced – like all Protestant territories of imperial immediacy – the Improved Calendar, as it was called by Protestants, in order not to mention the name of Pope Gregory XIII. So Sunday, 18 February of Old Style was followed by Monday, 1 March New Style.

The harbour of Vegesack became part of the city of Bremen in 1803. In 1811, Napoleon invaded Bremen and integrated it as the capital of the Département de Bouches-du-Weser (Department of the Mouths of the Weser) into the French State. In 1813, the French – as they retreated – withdrew from Bremen. Johann Smidt, Bremen's representative at the Congress of Vienna, was successful in achieving the non-mediatisation of Bremen, Hamburg and Lübeck, by which they were not incorporated into neighbouring monarchies, but became sovereign republics. Bremen joined the North German Confederation in 1867 and four years later became an autonomous component state of the new-founded German Empire and its successors.

The first German steamship was manufactured in 1817 in the shipyard of Johann Lange. In 1827, Bremen, under Johann Smidt, its mayor at that time, purchased land from the Kingdom of Hanover, to establish the city of Bremerhaven (Port of Bremen) as an outpost of Bremen because the river Weser was silting up. The shipping company Norddeutscher Lloyd (NDL) was founded in 1857. Lloyd was a byword for commercial shipping and is now a part of Hapag-Lloyd.

Beck's Brewery was founded in 1837 and remains in operation today as part of Anheuser-Busch InBev. In 1872, the Bremen Cotton Exchange was founded.

The Soviet Republic of Bremen existed from January to February 1919 in the aftermath of World War I, before it was overthrown by Gerstenberg Freikorps.

Henrich Focke, Georg Wulf and Werner Naumann founded Focke-Wulf Flugzeugbau AG in Bremen in 1923; the aircraft construction company as of 2010 forms part of Airbus, a manufacturer of civil and military aircraft. Borgward, an automobile manufacturer, was founded in 1929, and is today part of Daimler AG.

The villages of Grohn, Schönebeck, Aumund, Hammersbeck, Fähr, Lobbendorf, Blumenthal, Farge and Rekum became part of the city of Bremen in 1939. The Bremen-Vegesack concentration camp operated during World War II.

Allied bombing destroyed 60% of the built up area of Bremen during World War II.^[18] The British 3rd Infantry Division under General Whistler captured Bremen in late April 1945.^[19]

In 1946 Bremen's mayor Wilhelm Kaisen (SPD) travelled to the U.S. to re-establish Bremen's statehood, as Bremen had traditionally been a city-state, in order to prevent its incorporation into the state of Lower Saxony in the British zone of occupation. In 1947 the city became an enclave, part of the American occupation zone surrounded by the British zone.

In 1947, Martin Mende founded Nordmende, a manufacturer of entertainment electronics. The company existed until 1987. OHB-System, a manufacturer of medium-sized space-flight satellites, was founded in 1958.

The University of Bremen, founded in 1971, is one of 11 institutions classed as an "Elite university" in Germany, and teaches approximately 23,500 people from 126 countries.

Bremen lies on both sides of the River Weser, about 60 kilometres (37 miles) upstream of its estuary on the North Sea and its transition to the Outer Weser by Bremerhaven. Opposite Bremen's Altstadt is the point where the "Middle Weser" becomes the "Lower Weser" and, from the area of Bremen's port, the river has been made navigable to ocean-going vessels. The region on the left bank of the Lower Weser, through which the Ochtum flows, is the Weser Marshes, the landscape on its right bank is part of the Elbe-Weser Triangle. The Lesum, and its tributaries, the Wümme and Hamme, the Schönebecker Aue and Blumenthaler Aue, are the downstream tributaries of the Weser.

The city's municipal area is about 38 kilometres (24 miles) long and 16 kilometres (10 miles) wide. In terms of area, Bremen is the thirteenth largest city in Germany; and in terms of population the second largest city in northwest Germany after Hamburg and the tenth largest in the whole of Germany (see: List of cities in Germany).

Bremen lies about 50 kilometres (31 miles) east of the city of Oldenburg, 110 kilometres (68 miles) southwest of Hamburg, 120 kilometres (75 miles) northwest of Hanover, 100 kilometres (62 miles) north of Minden and 105 kilometres (65 miles) northeast of Osnabrück. Part of Bremerhaven's port territory forms an exclave of the City of Bremen.

The inner city lies on a Weser dune, which reaches a natural height of 10.5 m above sea level (NN) at Bremen Cathedral; its highest point, though, is 14.4 m above sea level (NN) and lies to the east at the Polizeihaus, Am Wall 196. The highest natural feature in the city of Bremen is 32.5 m above NN and lies in Friedehorst Park in the northwestern borough of Burglesum.^{[20] []} As a result, Bremen has the lowest high point of all the German states.^[21]

Bremen has a moderate oceanic climate (Köppen climate classification Cfb) due to its proximity to the North Sea coast and temperate maritime air masses that move in with the predominantly westerly winds from the Atlantic Ocean. However, periods in which continental air masses predominate may occur at any time of the year and can lead to heat waves in the summer and prolonged periods of frost in the winter. In general though, extremes are rare in Bremen and temperatures below −15 °C (5.0 °F) and above 35 °C (95.0 °F) occur only once every couple of years. The record high temperature was 37.6 °C (99.7 °F) on 9 August 1992, while the official record low temperature was −23.6 °C (−10.5 °F) on 13 February 1940.^[22] However, the astronomer Heinrich Wilhelm Matthias Olbers reported to have measured −27,3 °C on 23. January 1823.^[23] Being at some distance from the main North Sea, Bremen still has a somewhat wider temperature range than Bremerhaven that is located on the mouth of Weser.

Average temperatures have risen continually over the last decades, leading to a 0.6 °C (1.1 °F) rise in the mean annual temperature between 1961–90 and 1981–2010 reference periods. As in most parts of Germany, the year 2014 has been the warmest year on record averaging 11.1 °C (52.0 °F), making Bremen the second-warmest German state after Berlin in 2014.^[24] While Bremen is located in the comparatively cloudy northwestern part of Germany, there has been a significant increase in average sunshine hours over the last decades, especially in the months of April, May and July, causing the annual mean to rise by 62 hours between the two reference periods mentioned above.^[25] This trend has continued over the last 10 years, which average 1614 hours of sunshine, a good 130 hours more than in the international reference period of 1961–90.^[26] Nevertheless, especially the winters remain extremely gloomy by international standards with December averaging hardly more than one hour of sunshine (out of 7 astronomically possible) per day, a feature that Bremen shares with most of Germany and its neighbouring countries, though.

Precipitation is distributed fairly even around the year with a small peak in summer mainly due to convective precipitation, i.e. showers and thunderstorms. Snowfall and the period of snow cover are variable; whereas in some years, hardly any snow accumulation occurs, there has recently been a series of unusually snowy winters, peaking in the record year 2010 counting 84 days with a snow cover.^[27] Nevertheless, snow accumulation of more than 20 centimetres (8 in) remains exceptional, the record being 68 centimetres (26.8 in) of snow on 18 February 1979.

The warmest months in Bremen are June, July, and August, with average high temperatures of 20.2 to 22.6 °C (68.4 to 72.7 °F). The coldest are December, January, and February, with average low temperatures of −1.1 to 0.3 °C (30.0 to 32.5 °F). Typical of its maritime location, autumn tends to remain mild well into October, while spring arrives later than in the southwestern parts of the country.

As of 2015, Bremen had a population of 557,464 of whom about 89,713 (16%) had foreign citizenship.^{[20] []} Furthermore, 32% of the city population were of non-German origin/ethnicity as of 2017.^[30]

Number of minorities in Bremen by nationality as of 31 December 2015:^{[20] []}

The Stadtbürgerschaft (municipal assembly) is made up of 68 of the 83 legislators of the state legislature, the Bremische Bürgerschaft ^[79] , who reside in the city of Bremen. The legislature is elected by the citizens of Bremen every four years.

Bremen has a reputation as a Left-wing city. This left wing atmosphere largely stems from a transition from an industrial economy to a service economy.^[31] In elections for the Stadtbürgerschaft, the Social Democratic Party has dominated for decades. The Greens have also been very successful in city elections. The state of Bremen, which consists of the city, is governed by a coalition of the Social Democratic Party and The Greens.

One of the two mayors (Bürgermeister) is elected President of the Senate (Präsident des Senats) and serves as head of the city and the state. The current president is Carsten Sieling

Provisional results; the AfD did not reach the 5% threshold in Bremerhaven (and will hence only receive seats for votes from Bremen), the BIW did not reach the threshold in Bremen (and will only receive one seat in Bremerhaven, none in Bremen).^[32][33]

More contemporary tourist attractions include:

The Freie Waldorfschule in Bremen-Sebaldsbrück was Germany's first school built to the Passivhaus low-energy building standard.^[42]

According to data from the Organization of Economic Cooperation and Development, Bremen had a GDP per capita of $53,379 in 2013, higher than the average for Germany as a whole. For comparison, in 2013, the World Bank reported Germany had a GDP per capita of $46,268, and the EU overall had a GDP per capita of $35,408 in the same year.^[43]

Bremen is the second development centre of the region, after Hamburg. It forms part of the production network of Airbus SAS and this is where equipping of the wing units for all widebody Airbus aircraft and the manufacture of small sheet metal parts takes place. Structural assembly, including that of metal landing flaps, is another focal point. Within the framework of Airbus A380 production, assembly of the landing flaps (high lift systems) is carried out here. The pre-final assembly of the fuselage section (excluding the cockpit) of the A400M military transport aircraft takes place before delivery on to Spain.^[44]

More than 3,100 persons are employed at Airbus Bremen, the second largest Airbus site in Germany. As part of the Centre of Excellence – Wing/Pylon, Bremen is responsible for the design and manufacture of high-lift systems for the wings of Airbus aircraft. The entire process chain for the high-lift elements is established here, including the project office, technology engineering, flight physics, system engineering, structure development, verification tests, structural assembly, wing equipping and ultimate delivery to the final assembly line. In addition, Bremen manufactures sheet metal parts like clips and thrust crests for all Airbus aircraft as part of the Centre of Excellence – Fuselage and Cabin.^[45]

In Bremen there is a plant of EADS Astrium and the headquarters of OHB-System, respectively the first and the third space companies of European Union.

There is also a Mercedes-Benz factory in Bremen, building the C, CLK, SL, SLK, and GLK series of cars.^[46]

Beck & Co's headlining brew Beck's and St Pauli Girl beers are brewed in Bremen. In past centuries when Bremen's port was the "key to Europe", the city also had a large number of wine importers, but the number is down to a precious few. Apart from that there is another link between Bremen and wine: about 800 years ago, quality wines were produced here. The largest wine cellar in the world is located in Bremen (below the city's main square), which was once said to hold over 1 million bottles, but during WWII was raided by occupying forces.

A large number of food producing or trading companies are located in Bremen with their German or European headquarters: Anheuser-Busch InBev (Beck's Brewery), Kellogg's, Kraft Foods (Kraft, Jacobs Coffee, Milka Chocolate, Milram, Miràcoli), Frosta (frosted food), Nordsee (chain of sea fast food), Melitta Kaffee, Eduscho Kaffee, Azul Kaffee, Vitakraft (pet articles and food for cats, dogs, birds, fish, rodents and other pets), Atlanta AG (Chiquita banana), chocolatier Hachez (fine chocolate and confiserie), feodora chocolatier.

Bremer Woll-Kämmerei (BWK), a worldwide operating company for manufacturing wool and trading in wool and similar products, is headquartered in Bremen.

Bremen has an international airport situated 3 km (2 mi) south of the city centre.

Trams in Bremen and local bus services are offered by the Bremer Straßenbahn AG (translates from German as Bremen Tramways Corporation), often abbreviated BSAG, the public transport provider for Bremen.^[47]

The Bremen S-Bahn covers the Bremen/Oldenburg Metropolitan Region, from Bremerhaven in the north to Twistringen in the south and from Oldenburg in the west, centred on Bremen Central Station. It has been in operation since 2010.^[48] This network unified existing regional transport in Bremen as well as surrounding cities, including Bremerhaven, Delmenhorst, Twistringen, Nordenham, Oldenburg, and Verden an der Aller. The network lies completely within the area of the Bremen-Lower Saxony Transport Association, whose tariff structure applies.

Bremen is home to the football team Werder Bremen, who won the German Football Championship for the fourth time and the German Football Cup for the fifth time in 2004, making them only the fourth team in German football history to win the double; the club won the German Football Cup for the sixth time in 2009. Only Bayern Munich has won more titles. In the final match of the 2009–10 season, Werder Bremen lost to Bayern Munich. The home stadium of SV Werder Bremen is the Weserstadion, a pure football stadium, almost completely surrounded by solar cells. It is one of the biggest buildings in Europe delivering alternative energy.

With 18000 students,^[50] the University of Bremen is the largest university in Bremen, and is also home to the international Goethe-Institut and the Fallturm Bremen. Additionally, Bremen has a University of the Arts and the Bremen University of Applied Sciences. In 2001, the private Jacobs University Bremen was founded. All major German research foundations maintain institutes in Bremen, with a focus on marine sciences: The Max Planck Society with the Max Planck Institute for Marine Microbiology, and the Gottfried Wilhelm Leibniz Scientific Community with the Center for Tropical Marine Ecology (zmt).^[51] The Bremerhaven-based Alfred-Wegener-Institute of the Helmholtz Association closely cooperates with the aforementioned institutes, especially within the MARUM^[52] a center for marine environmental sciences, affiliated to the University of Bremen. Furthermore, The Fraunhofer Society is present in Bremen with centers for applied material research (IFAM^[53]) and medical image computing (MEVIS^[54]).

Bremen is twinned with:^[55]

^1 Then German Democratic Republic

"Informal" relationships: