The Maurya Empire was a geographically extensive Iron Age historical power based in Magadha and founded by Chandragupta Maurya which dominated the Indian subcontinent between 322 and 185 BCE. Comprising the majority of South Asia, the Maurya Empire was centralized by the conquest of the Indo-Gangetic Plain, and its capital city was located at Pataliputra (modern Patna).^[6][7] The empire was the largest political entity to have existed in the Indian subcontinent, extending over 5 million square kilometres (1.9 million square miles) at its zenith under Ashoka.^[8]

Chandragupta Maurya raised an army, with the assistance of Chanakya (also known as Kauṭilya),^[9] and overthrew the Nanda Empire in c. 322 BCE. Chandragupta rapidly expanded his power westwards across central and western India by conquering the satraps left by Alexander the Great, and by 317 BCE the empire had fully occupied northwestern India.^[10] The Mauryan Empire then defeated Seleucus I, a diadochus and founder of the Seleucid Empire during the Seleucid–Mauryan war, thus acquiring territory west of the Indus River.^[11][12]

At its greatest extent, the empire stretched along the natural boundary of the Himalayas, to the east into Assam, to the west into Balochistan (southwest Pakistan and southeast Iran) and the Hindu Kush mountains of what is now eastern Afghanistan.^[13] The dynasty expanded into India's southern regions^[14][15] by the reign of the emperors Pushkar and Bindusara, but it excluded Kalinga (modern Odisha), until it was conquered by Ashoka.^[16] It declined for about 50 years after Ashoka's rule, and dissolved in 185 BCE with the foundation of the Shunga dynasty in Magadha.

Under Chandragupta Maurya and his successors, internal and external trade, agriculture, and economic activities all thrived and expanded across South Asia due to the creation of a single and efficient system of finance, administration, and security. The Maurya dynasty built the Grand Trunk Road, one of Asia's oldest and longest trade networks, connecting the Indian subcontinent with Central Asia.^[17] After the Kalinga War, the Empire experienced nearly half a century of centralized rule under Ashoka. Chandragupta Maurya's embrace of Jainism increased socio-religious reform across South Asia, while Ashoka's embrace of Buddhism and sponsorship of Buddhist missionaries allowed for the expansion of that faith into Sri Lanka, northwest India, Central Asia, Southeast Asia, Egypt, and Hellenistic Europe.^[18]

The population of the empire has been estimated to be about 50–60 million, making the Mauryan Empire one of the most populous empires of antiquity.^[19][20] Archaeologically, the period of Mauryan rule in South Asia falls into the era of Northern Black Polished Ware (NBPW). The Arthashastra^[21] and the Edicts of Ashoka are the primary sources of written records of Mauryan times. The Lion Capital of Ashoka at Sarnath is the national emblem of the modern Republic of India.

The name "Maurya" does not occur in Ashoka's inscriptions, or the contemporary Greek accounts such as Megasthenes's Indica, but it is attested by the following sources:^[22]

According to the Buddhist tradition, the ancestors of the Maurya kings had settled in a region where peacocks (mora in Pali) were abundant. Therefore, they came to be known as "Moriyas", literally, "belonging to the place of peacocks". According to another Buddhist account, these ancestors built a city called Moriya-nagara ("Moriya-city"), which was so called, because it was built with the "bricks coloured like peacocks' necks".^[24]

The dynasty's connection to the peacocks, as mentioned in the Buddhist and Jain traditions, seems to be corroborated by archaeological evidence. For example, peacock figures are found on the Ashoka pillar at Nandangarh and several sculptures on the Great Stupa of Sanchi. Based on this eviedence, modern scholars theorize that the peacock may have been the dynasty's emblem.^[25]

Some later authors, such as Dhundiraja (a commentator on the Mudrarakshasa) and an annotator of the Vishnu Purana,state that the word "Maurya" is derived from Mura, the name of the wife of a Nanda king and the mother (or grandmother) of the first Maurya king. However, the Puranas themselves make no mention of Mura and do not talk of any relation between the Nanda and the Maurya dynasties.^[26] Dhundiraja's derivation of the word seems to be his own invention: according to the Sanskrit rules, the derivative of the feminine name Mura (IAST: Murā) would be "Maureya"; the term "Maurya" can only be derived from the masculine "Mura".^[27]

The Maurya dynasty ruled for 137 years^[28] The cultural influence of the Hellenistic kingdoms founded in the Persianate regions of Gandhara, and parts of India and Kashmir, influenced the artistic style and culture of these places.^[29] After the death of Alexander the Great the founder of the Maurya dynasty, Candragupta Maurya, reconquered the Indus Valley and northwest India.^[30] Alexander's armies were forced to retreat back to Gandhara.^[29] Chandragupta then defeated Seleucus who ceded the Indus and Swat Valleys, Gandhara, and east Arachosia.^[30]

Chadragupta's grandson Ashoka fought a series of campaigns to extend Mauryan rule over northern and central India. There are no Greek and Persian influences in the works commissioned by Ashoka after his conversion to Buddhism.^[29]

The Maurya Empire was founded by Chandragupta Maurya, with help from Chanakya, at Takshashila, a noted center of learning. According to several legends, Chanakya travelled to Magadha, a kingdom that was large and militarily powerful and feared by its neighbours, but was insulted by its king Dhana Nanda, of the Nanda dynasty. Chanakya swore revenge and vowed to destroy the Nanda Empire.^[31] Meanwhile, the conquering armies of Alexander the Great refused to cross the Beas River and advance further eastward, deterred by the prospect of battling Magadha. Alexander returned to Babylon and re-deployed most of his troops west of the Indus River. Soon after Alexander died in Babylon in 323 BCE, his empire fragmented into independent kingdoms led by his generals.^[32]

The Greek generals Eudemus and Peithon ruled in the Indus Valley until around 317 BCE, when Chandragupta Maurya (with the help of Chanakya, who was now his advisor) orchestrated a rebellion to drive out the Greek governors, and subsequently brought the Indus Valley under the control of his new seat of power in Magadha.^[10]

Chandragupta Maurya's rise to power is shrouded in mystery and controversy. On one hand, a number of ancient Indian accounts, such as the drama Mudrarakshasa (Signet ring of Rakshasa – Rakshasa was the prime minister of Magadha) by Vishakhadatta, describe his royal ancestry and even link him with the Nanda family. A kshatriya clan known as the Maurya's are referred to in the earliest Buddhist texts, Mahaparinibbana Sutta. However, any conclusions are hard to make without further historical evidence. Chandragupta first emerges in Greek accounts as "Sandrokottos". As a young man he is said to have met Alexander.^[33] He is also said to have met the Nanda king, angered him, and made a narrow escape.^[34] Chanakya's original intentions were to train army under Chandragupta's command.

Chanakya encouraged Chandragupta Maurya and his army to take over the throne of Magadha. Using his intelligence network, Chandragupta gathered many young men from across Magadha and other provinces, men upset over the corrupt and oppressive rule of king Dhana Nanda, plus the resources necessary for his army to fight a long series of battles. These men included the former general of Taxila, accomplished students of Chanakya, the representative of King Parvataka, his son Malayaketu, and the rulers of small states. The Macedonians (described as Yona or Yavana in Indian sources) may then have participated, together with other groups, in the armed uprising of Chandragupta Maurya against the Nanda dynasty.^[36][37] The Mudrarakshasa of Visakhadutta as well as the Jaina work Parisishtaparvan talk of Chandragupta's alliance with the Himalayan king Parvataka, often identified with Porus,^[38][39] although this identification is not accepted by all historians.^[40] This Himalayan alliance gave Chandragupta a composite and powerful army made up of Yavanas (Greeks), Kambojas, Shakas (Scythians), Kiratas (Himalayans), Parasikas (Persians) and Bahlikas (Bactrians) who took Pataliputra (also called Kusumapura, "The City of Flowers"):^[41]

Preparing to invade Pataliputra, Maurya came up with a strategy. A battle was announced and the Magadhan army was drawn from the city to a distant battlefield to engage with Maurya's forces. Maurya's general and spies meanwhile bribed the corrupt general of Nanda. He also managed to create an atmosphere of civil war in the kingdom, which culminated in the death of the heir to the throne. Chanakya managed to win over popular sentiment. Ultimately Nanda resigned, handing power to Chandragupta, and went into exile and was never heard of again. Chanakya contacted the prime minister, Rakshasas, and made him understand that his loyalty was to Magadha, not to the Nanda dynasty, insisting that he continue in office. Chanakya also reiterated that choosing to resist would start a war that would severely affect Magadha and destroy the city. Rakshasa accepted Chanakya's reasoning, and Chandragupta Maurya was legitimately installed as the new King of Magadha. Rakshasa became Chandragupta's chief advisor, and Chanakya assumed the position of an elder statesman.

After the death of Alexander the Great in 323 BCE, Chandragupta led a series of campaigns in 305 BCE to retake satrapies in the Indus Valley and northwest India.^[30] When Alexander's remaining forces were routed, returning westwards, Seleucus I Nicator fought to defend these territories. Not many details of the campaigns are known from ancient sources. Seleucus was defeated and retreated into the mountainous region of Afghanistan.^[43]

The two rulers concluded a peace treaty in 303 BCE, including a marital alliance. Under its terms, Chandragupta received the satrapies of Paropamisadae (Kamboja and Gandhara) and Arachosia (Kandhahar) and Gedrosia (Balochistan). Seleucus I received the 500 war elephants that were to have a decisive role in his victory against western Hellenistic kings at the Battle of Ipsus in 301 BCE. Diplomatic relations were established and several Greeks, such as the historian Megasthenes, Deimakos and Dionysius resided at the Mauryan court.

Megasthenes in particular was a notable Greek ambassador in the court of Chandragupta Maurya.^[44] According to Arrian, ambassador Megasthenes (c.350–c.290 BCE) lived in Arachosia and travelled to Pataliputra.^[45] Megasthenes' description of Mauryan society as freedom-loving gave Seleucus a means to avoid invasion, however, underlying Seleucus' decision was the improbability of success. In later years, Seleucus' successors maintained diplomatic relations with the Empire based on similar accounts from returning travellers.^[30]

Chandragupta established a strong centralized state with an administration at Pataliputra, which, according to Megasthenes, was "surrounded by a wooden wall pierced by 64 gates and 570 towers". Aelian, although not expressly quoting Megasthenes nor mentionning Pataliputra, described Indian palaces as superior in splendor to Persia's Susa or Ectabana.^[46] The architecture of the city seems to have had many similarities with Persian cities of the period.^[47]

Chandragupta's son Bindusara extended the rule of the Mauryan empire towards southern India. The famous Tamil poet Mamulanar of the Sangam literature described how areas south of the Deccan Plateau which comprised Tamil country was invaded by the Maurya army using troops from Karnataka. Mamulanar states that Vadugar (people who resided in andhra-karnataka regions immediately to the north of Tamil Nadu) formed the vanguard of the Mauryan army.^[23][48] He also had a Greek ambassador at his court, named Megasthenes.^[49] According to plutarch Chandragupta maurya subdued entire India, Justin also observed that chandragupta maurya ws ''in possession of India'', this is corroborated by Tamil sangam literature which mentions about mauryan invasion with their south Indian allies and defeat of their rivals at Podiyil hill in Tinnevelley district in present-day Tamil Nadu.^[50][51]

Chandragupta renounced his throne and followed Jain teacher Bhadrabahu.^[52][53][54] He is said to have lived as an ascetic at Shravanabelagola for several years before fasting to death, as per the Jain practice of sallekhana.^[55]

Bindusara was born to Chandragupta, the founder of the Mauryan Empire. This is attested by several sources, including the various Puranas and the Mahavamsa.^[56] He is attested by the Buddhist texts such as Dipavamsa and Mahavamsa ("Bindusaro"); the Jain texts such as Parishishta-Parvan; as well as the Hindu texts such as Vishnu Purana ("Vindusara").^[57][58] According to the 12th century Jain writer Hemachandra's Parishishta-Parvan, the name of Bindusara's mother was Durdhara.^[59] Some Greek sources also mention him by the name "Amitrochates" or its variations.^[60][61]

Historian Upinder Singh estimates that Bindusara ascended the throne around 297 BCE.^[48] Bindusara, just 22 years old, inherited a large empire that consisted of what is now, Northern, Central and Eastern parts of India along with parts of Afghanistan and Baluchistan. Bindusara extended this empire to the southern part of India, as far as what is now known as Karnataka. He brought sixteen states under the Mauryan Empire and thus conquered almost all of the Indian peninsula (he is said to have conquered the 'land between the two seas' – the peninsular region between the Bay of Bengal and the Arabian Sea). Bindusara didn't conquer the friendly Tamil kingdoms of the Cholas, ruled by King Ilamcetcenni, the Pandyas, and Cheras. Apart from these southern states, Kalinga (modern Odisha) was the only kingdom in India that didn't form the part of Bindusara's empire.^[62] It was later conquered by his son Ashoka, who served as the viceroy of Ujjaini during his father's reign, which highlights the importance of the town.^[63][64]

Bindusara's life has not been documented as well as that of his father Chandragupta or of his son Ashoka. Chanakya continued to serve as prime minister during his reign. According to the medieval Tibetan scholar Taranatha who visited India, Chanakya helped Bindusara "to destroy the nobles and kings of the sixteen kingdoms and thus to become absolute master of the territory between the eastern and western oceans."^[65] During his rule, the citizens of Taxila revolted twice. The reason for the first revolt was the maladministration of Susima, his eldest son. The reason for the second revolt is unknown, but Bindusara could not suppress it in his lifetime. It was crushed by Ashoka after Bindusara's death.^[66]

Bindusara maintained friendly diplomatic relations with the Hellenic World. Deimachus was the ambassador of Seleucid emperor Antiochus I at Bindusara's court.^[67] Diodorus states that the king of Palibothra (Pataliputra, the Mauryan capital) welcomed a Greek author, Iambulus. This king is usually identified as Bindusara.^[67] Pliny states that the Egyptian king Philadelphus sent an envoy named Dionysius to India.^[68][69] According to Sailendra Nath Sen, this appears to have happened during Bindusara's reign.^[67]

Unlike his father Chandragupta (who at a later stage converted to Jainism), Bindusara believed in the Ajivika sect. Bindusara's guru Pingalavatsa (Janasana) was a Brahmin^[70] of the Ajivika sect. Bindusara's wife, Queen Subhadrangi (Queen Dharma/ Aggamahesi) was a Brahmin^[71] also of the Ajivika sect from Champa (present Bhagalpur district). Bindusara is credited with giving several grants to Brahmin monasteries (Brahmana-bhatto).^[72]

Historical evidence suggests that Bindusara died in the 270s BCE. According to Upinder Singh, Bindusara died around 273 BCE.^[48] Alain Daniélou believes that he died around 274 BCE.^[65] Sailendra Nath Sen believes that he died around 273-272 BCE, and that his death was followed by a four-year struggle of succession, after which his son Ashoka became the emperor in 269-268 BCE.^[67] According to the Mahavamsa, Bindusara reigned for 28 years.^[73] The Vayu Purana, which names Chandragupta's successor as "Bhadrasara", states that he ruled for 25 years.^[74]

As a young prince, Ashoka (r. 272–232 BCE) was a brilliant commander who crushed revolts in Ujjain and Takshashila. As monarch he was ambitious and aggressive, re-asserting the Empire's superiority in southern and western India. But it was his conquest of Kalinga (262–261 BCE) which proved to be the pivotal event of his life. Ashoka used Kalinga to project power over a large region by building a fortification there and securing it as a possession.^[75] Although Ashoka's army succeeded in overwhelming Kalinga forces of royal soldiers and civilian units, an estimated 100,000 soldiers and civilians were killed in the furious warfare, including over 10,000 of Ashoka's own men. Hundreds of thousands of people were adversely affected by the destruction and fallout of war. When he personally witnessed the devastation, Ashoka began feeling remorse. Although the annexation of Kalinga was completed, Ashoka embraced the teachings of Buddhism, and renounced war and violence. He sent out missionaries to travel around Asia and spread Buddhism to other countries.

Ashoka implemented principles of ahimsa by banning hunting and violent sports activity and ending indentured and forced labor (many thousands of people in war-ravaged Kalinga had been forced into hard labour and servitude). While he maintained a large and powerful army, to keep the peace and maintain authority, Ashoka expanded friendly relations with states across Asia and Europe, and he sponsored Buddhist missions. He undertook a massive public works building campaign across the country. Over 40 years of peace, harmony and prosperity made Ashoka one of the most successful and famous monarchs in Indian history. He remains an idealized figure of inspiration in modern India.

The Edicts of Ashoka, set in stone, are found throughout the Subcontinent. Ranging from as far west as Afghanistan and as far south as Andhra (Nellore District), Ashoka's edicts state his policies and accomplishments. Although predominantly written in Prakrit, two of them were written in Greek, and one in both Greek and Aramaic. Ashoka's edicts refer to the Greeks, Kambojas, and Gandharas as peoples forming a frontier region of his empire. They also attest to Ashoka's having sent envoys to the Greek rulers in the West as far as the Mediterranean. The edicts precisely name each of the rulers of the Hellenic world at the time such as Amtiyoko (Antiochus), Tulamaya (Ptolemy), Amtikini (Antigonos), Maka (Magas) and Alikasudaro (Alexander) as recipients of Ashoka's proselytism. The Edicts also accurately locate their territory "600 yojanas away" (a yojanas being about 7 miles), corresponding to the distance between the center of India and Greece (roughly 4,000 miles).^[76]

Ashoka was followed for 50 years by a succession of weaker kings. He was succeeded by Dasharatha Maurya, who was Ashoka's grandson. None of Ashoka's sons could ascend the throne after him. Mahendra, his first born, was on to spread Buddhism in the world. Kunala Maurya was blind hence couldn't ascend the throne and Tivala, son of Kaurwaki, died even earlier than Ashoka. Another son, Jalauka, does not have much story behind him.

The empire lost many territories under Dasharatha, which were later reconquered by Samprati, Kunala's son. Post Samprati, the Mauryas slowly lost many territories. In 180 BCE, Brihadratha Maurya, was killed by his general Pushyamitra Shunga in a military parade without any heir. Hence, the great Maurya empire finally ended, giving rise to the Shunga Empire.

Buddhist records such as the Ashokavadana write that the assassination of Brihadratha and the rise of the Shunga empire led to a wave of religious persecution for Buddhists,^[77] and a resurgence of Hinduism. According to Sir John Marshall,^[78] Pushyamitra may have been the main author of the persecutions, although later Shunga kings seem to have been more supportive of Buddhism. Other historians, such as Etienne Lamotte^[79] and Romila Thapar,^[80] among others, have argued that archaeological evidence in favour of the allegations of persecution of Buddhists are lacking, and that the extent and magnitude of the atrocities have been exaggerated.

The fall of the Mauryas left the Khyber Pass unguarded, and a wave of foreign invasion followed. The Greco-Bactrian king, Demetrius, capitalized on the break-up, and he conquered southern Afghanistan and parts of northwestern India around 180 BCE, forming the Indo-Greek Kingdom. The Indo-Greeks would maintain holdings on the trans-Indus region, and make forays into central India, for about a century. Under them, Buddhism flourished, and one of their kings, Menander, became a famous figure of Buddhism; he was to establish a new capital of Sagala, the modern city of Sialkot. However, the extent of their domains and the lengths of their rule are subject to much debate. Numismatic evidence indicates that they retained holdings in the subcontinent right up to the birth of Christ. Although the extent of their successes against indigenous powers such as the Shungas, Satavahanas, and Kalingas are unclear, what is clear is that Scythian tribes, renamed Indo-Scythians, brought about the demise of the Indo-Greeks from around 70 BCE and retained lands in the trans-Indus, the region of Mathura, and Gujarat.

The Empire was divided into four provinces, with the imperial capital at Pataliputra. From Ashokan edicts, the names of the four provincial capitals are Tosali (in the east), Ujjain (in the west), Suvarnagiri (in the south), and Taxila (in the north). The head of the provincial administration was the Kumara (royal prince), who governed the provinces as king's representative. The kumara was assisted by Mahamatyas and council of ministers. This organizational structure was reflected at the imperial level with the Emperor and his Mantriparishad (Council of Ministers).

Historians theorise that the organisation of the Empire was in line with the extensive bureaucracy described by Kautilya in the Arthashastra: a sophisticated civil service governed everything from municipal hygiene to international trade. The expansion and defense of the empire was made possible by what appears to have been one of the largest armies in the world during the Iron Age.^[81] According to Megasthenes, the empire wielded a military of 600,000 infantry, 30,000 cavalry, 8,000 chariots and 9,000 war elephants besides followers and attendants.^[82] A vast espionage system collected intelligence for both internal and external security purposes. Having renounced offensive warfare and expansionism, Ashoka nevertheless continued to maintain this large army, to protect the Empire and instil stability and peace across West and South Asia.

Arthashastra and Megasthenes accounts of Pataliputra describe the intricate municipal system formed by Maurya empire to govern its cities. A city counsel made up of thirty commissioners was divided into six committees or boards which governed the city. The first board fixed wages and looked after provided goods, second board made arrangement for foreign dignitaries, tourists and businessmen, third board made records and registrations, fourth looked after manufactured goodsand sale of commodities, fifth board regulated trade, issued licenses and checked weights and measurements, sixth board collected sales taxes. Some cities such as taxila had autonomy to issue their own coins. The city counsel had officers who looked after public welfare such as maintenance of roads, public buildings, markets, hospitals, educational institutions etc.^[83] The official head of the village was Gramika (in towns Nagarika).^[84] The city counsel also had some magisterial powers.

For the first time in South Asia, political unity and military security allowed for a common economic system and enhanced trade and commerce, with increased agricultural productivity. The previous situation involving hundreds of kingdoms, many small armies, powerful regional chieftains, and internecine warfare, gave way to a disciplined central authority. Farmers were freed of tax and crop collection burdens from regional kings, paying instead to a nationally administered and strict-but-fair system of taxation as advised by the principles in the Arthashastra. Chandragupta Maurya established a single currency across India, and a network of regional governors and administrators and a civil service provided justice and security for merchants, farmers and traders. The Mauryan army wiped out many gangs of bandits, regional private armies, and powerful chieftains who sought to impose their own supremacy in small areas. Although regimental in revenue collection, Maurya also sponsored many public works and waterways to enhance productivity, while internal trade in India expanded greatly due to new-found political unity and internal peace.

Under the Indo-Greek friendship treaty, and during Ashoka's reign, an international network of trade expanded. The Khyber Pass, on the modern boundary of Pakistan and Afghanistan, became a strategically important port of trade and intercourse with the outside world. Greek states and Hellenic kingdoms in West Asia became important trade partners of India. Trade also extended through the Malay peninsula into Southeast Asia. India's exports included silk goods and textiles, spices and exotic foods. The external world came across new scientific knowledge and technology with expanding trade with the Mauryan Empire. Ashoka also sponsored the construction of thousands of roads, waterways, canals, hospitals, rest-houses and other public works. The easing of many over-rigorous administrative practices, including those regarding taxation and crop collection, helped increase productivity and economic activity across the Empire.

In many ways, the economic situation in the Mauryan Empire is analogous to the Roman Empire of several centuries later. Both had extensive trade connections and both had organizations similar to corporations. While Rome had organizational entities which were largely used for public state-driven projects, Mauryan India had numerous private commercial entities. These existed purely for private commerce and developed before the Mauryan Empire itself.^[85]

Chandragupta Maurya embraced Jainism after retiring, when he renounced his throne and material possessions to join a wandering group of Jain monks. Chandragupta was a disciple of the Jain monk Acharya Bhadrabahu. It is said that in his last days, he observed the rigorous but self-purifying Jain ritual of santhara (fast unto death), at Shravana Belgola in Karnataka.^{[87][54][88][53]} Samprati, the grandson of Ashoka, also patronized Jainism. Samprati was influenced by the teachings of Jain monks like Suhastin and he is said to have built 125,000 derasars across India.^[89] Some of them are still found in the towns of Ahmedabad, Viramgam, Ujjain, and Palitana. It is also said that just like Ashoka, Samprati sent messengers and preachers to Greece, Persia and the Middle East for the spread of Jainism, but, to date, no research has been done in this area.^[90][91]

Thus, Jainism became a vital force under the Mauryan Rule. Chandragupta and Samprati are credited for the spread of Jainism in South India. Hundreds of thousands of temples and stupas are said to have been erected during their reigns.

Magadha, the centre of the empire, was also the birthplace of Buddhism. Ashoka initially practised Hinduism but later embraced Buddhism; following the Kalinga War, he renounced expansionism and aggression, and the harsher injunctions of the Arthashastra on the use of force, intensive policing, and ruthless measures for tax collection and against rebels. Ashoka sent a mission led by his son Mahinda and daughter Sanghamitta to Sri Lanka, whose king Tissa was so charmed with Buddhist ideals that he adopted them himself and made Buddhism the state religion. Ashoka sent many Buddhist missions to West Asia, Greece and South East Asia, and commissioned the construction of monasteries and schools, as well as the publication of Buddhist literature across the empire. He is believed to have built as many as 84,000 stupas across India, such as Sanchi and Mahabodhi Temple, and he increased the popularity of Buddhism in Afghanistan, Thailand and North Asia including Siberia. Ashoka helped convene the Third Buddhist Council of India's and South Asia's Buddhist orders near his capital, a council that undertook much work of reform and expansion of the Buddhist religion. Indian merchants embraced Buddhism and played a large role in spreading the religion across the Mauryan Empire.^[92]

The greatest monument of this period, executed in the reign of Chandragupta Maurya, was the old palace at the site of Kumhrar. Excavations at the site of Kumhrar nearby have unearthed the remains of the palace. The palace is thought to have been an aggregate of buildings, the most important of which was an immense pillared hall supported on a high substratum of timbers. The pillars were set in regular rows, thus dividing the hall into a number of smaller square bays. The number of columns is 80, each about 7 meters high. According to the eyewitness account of Megasthenes, the palace was chiefly constructed of timber, and was considered to exceed in splendour and magnificence the palaces of Susa and Ecbatana, its gilded pillars being adorned with golden vines and silver birds. The buildings stood in an extensive park studded with fish ponds and furnished with a great variety of ornamental trees and shrubs.^[93] Kauṭilya's Arthashastra also gives the method of palace construction from this period. Later fragments of stone pillars, including one nearly complete, with their round tapering shafts and smooth polish, indicate that Ashoka was responsible for the construction of the stone columns which replaced the earlier wooden ones.

During the Ashokan period, stonework was of a highly diversified order and comprised lofty free-standing pillars, railings of stupas, lion thrones and other colossal figures. The use of stone had reached such great perfection during this time that even small fragments of stone art were given a high lustrous polish resembling fine enamel. This period marked the beginning of the Buddhist school of architecture. Ashoka was responsible for the construction of several stupas, which were large domes and bearing symbols of Buddha. The most important ones are located at Sanchi, Bharhut, Amaravati, Bodhgaya and Nagarjunakonda. The most widespread examples of Mauryan architecture are the Ashoka pillars and carved edicts of Ashoka, often exquisitely decorated, with more than 40 spread throughout the Indian subcontinent.^[94]

The peacock was a dynastic symbol of Mauryans, as depicted by Ashoka's pillars at Nandangarh and Sanchi Stupa.^[25]

The protection of animals in India became serious business by the time of the Maurya dynasty; being the first empire to provide a unified political entity in India, the attitude of the Mauryas towards forests, their denizens, and fauna in general is of interest.^[96]

The Mauryas firstly looked at forests as resources. For them, the most important forest product was the elephant. Military might in those times depended not only upon horses and men but also battle-elephants; these played a role in the defeat of Seleucus, one of Alexander's former generals. The Mauryas sought to preserve supplies of elephants since it was cheaper and took less time to catch, tame and train wild elephants than to raise them. Kautilya's Arthashastra contains not only maxims on ancient statecraft, but also unambiguously specifies the responsibilities of officials such as the Protector of the Elephant Forests.^[97]

The Mauryas also designated separate forests to protect supplies of timber, as well as lions and tigers for skins. Elsewhere the Protector of Animals also worked to eliminate thieves, tigers and other predators to render the woods safe for grazing cattle.

The Mauryas valued certain forest tracts in strategic or economic terms and instituted curbs and control measures over them. They regarded all forest tribes with distrust and controlled them with bribery and political subjugation. They employed some of them, the food-gatherers or aranyaca to guard borders and trap animals. The sometimes tense and conflict-ridden relationship nevertheless enabled the Mauryas to guard their vast empire.^[98]

When Ashoka embraced Buddhism in the latter part of his reign, he brought about significant changes in his style of governance, which included providing protection to fauna, and even relinquished the royal hunt. He was the first ruler in history to advocate conservation measures for wildlife and even had rules inscribed in stone edicts. The edicts proclaim that many followed the king's example in giving up the slaughter of animals; one of them proudly states:^[98]

However, the edicts of Ashoka reflect more the desire of rulers than actual events; the mention of a 100 'panas' (coins) fine for poaching deer in royal hunting preserves shows that rule-breakers did exist. The legal restrictions conflicted with the practices freely exercised by the common people in hunting, felling, fishing and setting fires in forests.^[98]

Relations with the Hellenistic world may have started from the very beginning of the Maurya Empire. Plutarch reports that Chandragupta Maurya met with Alexander the Great, probably around Taxila in the northwest:^[99]

Chandragupta ultimately occupied Northwestern India, in the territories formerly ruled by the Greeks, where he fought the satraps (described as "Prefects" in Western sources) left in place after Alexander (Justin), among whom may have been Eudemus, ruler in the western Punjab until his departure in 317 BCE or Peithon, son of Agenor, ruler of the Greek colonies along the Indus until his departure for Babylon in 316 BCE.

Seleucus I Nicator, the Macedonian satrap of the Asian portion of Alexander's former empire, conquered and put under his own authority eastern territories as far as Bactria and the Indus (Appian, History of Rome, The Syrian Wars 55), until in 305 BCE he entered into a confrontation with Emperor Chandragupta:

Though no accounts of the conflict remain, it is clear that Seleucus fared poorly against the Indian Emperor as he failed to conquer any territory, and in fact was forced to surrender much that was already his. Regardless, Seleucus and Chandragupta ultimately reached a settlement and through a treaty sealed in 305 BCE, Seleucus, according to Strabo, ceded a number of territories to Chandragupta, including eastern Afghanistan and Balochistan.

Chandragupta and Seleucus concluded a peace treaty and a marital alliance in 303 BCE. Chandragupta received vast territories and in a return gave Seleucus 500 war elephants,^{[104][105][106][107][108]} a military asset which would play a decisive role at the Battle of Ipsus in 301 BCE.^[109] In addition to this treaty, Seleucus dispatched an ambassador, Megasthenes, to Chandragupta, and later Deimakos to his son Bindusara, at the Mauryan court at Pataliputra (modern Patna in Bihar). Later, Ptolemy II Philadelphus, the ruler of Ptolemaic Egypt and contemporary of Ashoka, is also recorded by Pliny the Elder as having sent an ambassador named Dionysius to the Mauryan court.^[110]

Mainstream scholarship asserts that Chandragupta received vast territory west of the Indus, including the Hindu Kush, modern-day Afghanistan, and the Balochistan province of Pakistan.^[111][112] Archaeologically, concrete indications of Mauryan rule, such as the inscriptions of the Edicts of Ashoka, are known as far as Kandahar in southern Afghanistan.

The treaty on "Epigamia" implies lawful marriage between Greeks and Indians was recognized at the State level, although it is unclear whether it occurred among dynastic rulers or common people, or both.

Classical sources have also recorded that following their treaty, Chandragupta and Seleucus exchanged presents, such as when Chandragupta sent various aphrodisiacs to Seleucus:^[60]

His son Bindusara 'Amitraghata' (Slayer of Enemies) also is recorded in Classical sources as having exchanged presents with Antiochus I:^[60]

An influential and large Greek population was present in the northwest of the Indian subcontinent under Ashoka's rule, possibly remnants of Alexander's conquests in the Indus Valley region. In the Rock Edicts of Ashoka, some of them inscribed in Greek, Ashoka states that the Greeks within his dominion were converted to Buddhism:

Fragments of Edict 13 have been found in Greek, and a full Edict, written in both Greek and Aramaic, has been discovered in Kandahar. It is said to be written in excellent Classical Greek, using sophisticated philosophical terms. In this Edict, Ashoka uses the word Eusebeia ("Piety") as the Greek translation for the ubiquitous "Dharma" of his other Edicts written in Prakrit:

Also, in the Edicts of Ashoka, Ashoka mentions the Hellenistic kings of the period as recipients of his Buddhist proselytism, although no Western historical record of this event remains:

Ashoka also encouraged the development of herbal medicine, for men and animals, in their territories:

The Greeks in India even seem to have played an active role in the propagation of Buddhism, as some of the emissaries of Ashoka, such as Dharmaraksita, are described in Pali sources as leading Greek ("Yona") Buddhist monks, active in Buddhist proselytism (the Mahavamsa, XII^[118]).

Sophagasenus was an Indian Mauryan ruler of the 3rd century BCE, described in ancient Greek sources, and named Subhagasena or Subhashasena in Prakrit. His name is mentioned in the list of Mauryan princes, and also in the list of the Yadava dynasty, as a descendant of Pradyumna. He may have been a grandson of Ashoka, or Kunala, the son of Ashoka. He ruled an area south of the Hindu Kush, possibly in Gandhara. Antiochos III, the Seleucid king, after having made peace with Euthydemus in Bactria, went to India in 206 BCE and is said to have renewed his friendship with the Indian king there:

"He (Antiochus) crossed the Caucasus and descended into India; renewed his friendship with Sophagasenus the king of the Indians; received more elephants, until he had a hundred and fifty altogether; and having once more provisioned his troops, set out again personally with his army: leaving Androsthenes of Cyzicus the duty of taking home the treasure which this king had agreed to hand over to him". Polybius 11.39 ^[137]

According to Vicarasreni of Merutunga, Mauryans rose to power in 312 BC.^[119]