Athens (dpa) - Divers and archaeologists have discovered in front of the small Greek island Levitha several wrecks of merchant ships from Greek and Roman antiquity. Archaeologists estimate that the wrecks date back to the third century BC, according to the Greek Ministry of Culture. The sunken ships transported mainly amphorae and pottery items between ports of the Aegean and the eastern Mediterranean. Archaeologists said on Greek radio that the finds were invaluable.