Kosambi (Pali) or Kaushambi (Sanskrit) was an important city in ancient India. It was the capital of the Vatsa kingdom, one of the sixteen mahajanapadas. It was located on the Yamuna River about southwest of its confluence with the Ganges at Prayaga (modern Prayagraj).
History
During the 2nd millennium BCE Ochre Coloured Pottery culture spread in the region. Kosambi was one of the greatest cities in India from the late Vedic period until the end of Maurya Empire with occupation continuing until the Gupta Empire. As a small town, it was established in the late Vedic period, by the rulers of Kuru Kingdom as their new capital. The initial Kuru capital Hastinapur was destroyed by floods, and the Kuru King transferred his entire capital with the subjects to a new capital that he built near the Ganga-Jamuna confluence, which was 56 km away from the southernmost part of the Kuru Kingdom, and is now known as Prayagraj, previously called Allahabad.During the period prior the Maurya Empire, Kosambi was the capital of the independent kingdom of Vatsa, one of the Mahajanapadas. Kosambi was a very prosperous city by the time of Gautama Buddha, where a large number of wealthy merchants resided. It was an important entrepôt of goods and passengers from north-west and south. It figures very prominently in the accounts of the life of Buddha.
Historically, Kosambi remained a solid urban centre through the Mauryan period and during the Gupta period. Pillars of Ashoka are found both in Kosambi and in Allahabad. The present location of the Kosambi pillar inside the ruins of the fort attests to the existence of Mauryan military presence in the region. The Allahabad pillar is an edict issued toward the Mahamattas of Kosambi, giving credence to the fact that it was originally located in Kosambi.
The schism edict of Kaushambi (Minor Pillar Edict 2) states that, "The King instructs the officials of Kausambi as follows: ..... The way of the Sangha must not be abandoned..... Whosoever shall break the unity of Sangha, whether monk or nun from this time forth, shall be compelled to wear white garments, and to dwell in a place outside the sangha."
In the post-Mauryan period a tribal society at Kosambi (modern Allahabad district) made cast copper coinage with and without punchmarks. Their coinage resemble the Damaru-drum. All such coinage has been attributed to the Kosambi. Many Indian museums, such as the National Museum, have these coins in their collections.
It is possible that Pushyamitra Shunga may have shifted his capital from Pataliputra to Kaushambi. After his death, his empire was divided (perhaps amongst his sons), into several Mitra dynasties. The dynasty of Kaushambi also established hegemony over a wide area including Magadha, and possibly Kannauj as well.
All sources cite Kausambi as an important site during the period. More than three thousand stone sculptures have been recovered from Kausambi and its neighbouring ancient sites –7 Mainhai, Bhita, Mankunwar, and Deoria. These are currently housed in the Prof. G.R. Sharma Memorial Museum of the Department of Ancient History, University of Allahabad, Allahabad Museum and State Museum in Lucknow.
The excavations of the archaeological site of Kosambi was done by G. R. Sharma of Allahabad University in 1949 and again in 1951–1956 after it was authorized by Sir Mortimer Wheeler in March 1948. Excavations have suggested that the site may have been occupied as early as the 12th century BCE. Its strategic geographical location helped it emerge as an important trading center. According to James Heitzman, a large rampart of piled mud was constructed in the 7th to 5th centuries BCE, and was subsequently strengthened by brick walls and bastions, with numerous towers, battlements, and gateways but according to archaeologist G. R. Sharma, who led the archaeological excavation of the city, the rampart was built and provided with brick revetment between 1025 BC and 955 BC and the moat was excavated at the earliest between 855 and 815 BC. Carbon dating of charcoal and Northern Black Polished Ware have historically dated its continued occupation from 390 BC to 600 A.D.