Paestum was a major ancient Greek city on the coast of the Tyrrhenian Sea in Magna Graecia. After its foundation by Greek colonists under the name of Poseidonia it was eventually conquered by the Lucanians and later the Romans. The Lucanians renamed it to Paistos and the Romans gave the city its current name. As Pesto or Paestum, the medieval town became a bishopric, which is now a Latin Catholic titular see