Seleucia in Pieria, also known in English as Seleucia by the Sea, and later named Suedia, was a Hellenistic town, the seaport of Antioch ad Orontes, the Seleucid capital, modern Antakya (Turkey). The city was built slightly to the north of the estuary of the river Orontes, between small rivers on the western slopes of the Coryphaeus, one of the southern summits of the Amanus Mountains.