Localisation in Lucania on the Thyrrhenian coast (on account of its coins resembling those of Naxos (Sicily) and of Poseidonia). Also Sardinia, or Sergention (Sicily) have been suggested. Treaty (inscribed on bronze and discovered at Olympia, Greece) between the Sybarites and their allies and the Serdaioi for ever guaranteed by Zeus Apollo, and other gods, and the city of Poseidonia.