respectively). The powerful chiefdoms of the three ventar dominated the political and economic life of early historic south India. The frequent conflicts between the Chera, the Chola and the Pandya are well documented in ancient (the Sangam) Tamil poetry. The Cheras, Cholas and Pandyas also controlled the ports of Muziris (Muchiri), Korkai and Kaveri respectively (for the trade with the Graeco-Roman world). The gradual shift from chiefdoms to kingdoms seems to have occurred in the following period.The famous inscription of king Kharavela at Hathigumpha (mid-first century BCE) mentions the defeat of a confederacy of the "Tramira" countries which had been a threat to Kalinga. It also remembers the precious pearls brought to the capital as booty from the "Pandya" realm. The Pandya chiefdom was famous for its pearl fisheries and silk industry. Korkai and Alagankulam are believed to have been the exchange centres of the Pandyas. Korkai, a port at the mouth of the river Tambraparni, was linked to the famous pearl fisheries and Alagankulam was also developed as a port. A number of coins attributed to early historic Pandyas are found from the region. Inscriptions, datable to c. 2nd century BCE, recording royal grants – both from royals and wealthy commoners – were also discovered from the Pandya country. The Pandya seems to be the most prominent of the three "ventar" rulers. There are even references to a Pandya queen from 3rd century BCE representing a confederacy of the Tamil countries. Madurai, in south Tamil Nadu, was the most important cultural centre in south India as the core of the Tamil speakers. Megalithic relics such as menhirs, dolmens, urn burials, stone circles and rock-cut chambers/passages can be found in south India. Burial goods include iron objects, ivory ornaments, Black-and-Red Ware and even some Roman Imperial coins. The so-called "velir" hill chieftains are assumed to be associated with these megalithic burials. Greek and Latin accounts (early centuries CE), coins with legends in Tamil-Brahmi script, and Tamil-Brahmi inscriptions suggest the continuity of the Pandya dynasty from the 3rd century BCE to early centuries CE. The early Pandyas, along with the Cheras and the Cholas, were eventually displaced by the Kalabhra dynasty. Medieval Pandyas Pandya revival (7th–10th centuries CE) The Pandya kingdom was revived by king Kadungon (r. 590–620 CE) towards the end of the 6th century CE. In the Velvikudi inscription, a later copper-plate, Kadungon appears as the "destroyer" of the