Philip I - A.D. 244 - 249 - BMC RE # 518 - Tetradrachm Billion

Seleucia in Pieria (Greek Σελεύκεια ἐν Πιερίᾳ), also known in English as Seleucia by the Sea & later named Suedia, was a Hellenistic town, the seaport of Antioch ad Orontes (Syria Prima), 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.

According to Pausanias and Malalas, there was a previous city here named Palaeopolis ("Old City"). At present, it is located at the seaside village of Çevlik near the town of Samandağ in the Hatay Province of Turkey. Seleucia, Apamea, Laodicea, and Antioch formed the Syrian tetrapolis.

Roman Period - Seleucia's importance grew significantly over time, necessitating the enlargement of its harbours several times under Diocletian and Constantius. These harbours, called the "inner" & "outer" harbors, served from time to time the Roman navy.

Most buildings & structures today date from the Roman period.