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Seleucia(səlo͞o`shə), ancient city of Mesopotamia, on the Tigris below modern Baghdad. Founded (c.312 B.C.) by Seleucus ISeleucus I
(Seleucus Nicator) , d. 280 B.C., king of ancient Syria. An able general of Alexander the Great, he played a leading part in the wars of the Diadochi. In the new partition of the empire in 312 B.C. he received Babylonia.
..... Click the link for more information. , it soon replaced Babylon as the main center for east-west commerce through the valley. The city was the eastern capital of the Seleucids until the Parthians conquered it. The Seleucids then moved their capital across the river to CtesiphonCtesiphon
, ruined ancient city, 20 mi (32 km) SE of Baghdad, Iraq, on the left bank of the Tigris opposite Seleucia and at the mouth of the Diyala River. After 129 B.C. it was the winter residence of the Parthian kings. Ctesiphon grew rapidly and was of renowned splendor.
..... Click the link for more information. , and Seleucia was thus superseded. In a Parthian campaign Trajan burned the city, and in A.D. 164 it was destroyed by Romans. Another Seleucia was founded by Seleucus I in Syria as the seaport for Antioch on the Orontes.
in antiquity, a number of cities founded by Seleu-cus I Nicator or named after him.
Seleucia-on-Tigris, founded in 312 B.C., was the capital of the Seleucid state and a major trading center, crossed by trade routes between east and west. In the first century A.D. it had about 600,000 inhabitants. From about A.D 150 it was under Parthian rule. Seleucia-on-Tigris was destroyed in A.D. 164 or 165 by the Roman general Avidius Cassius.
Seleucia Pieria was founded about 300 B.C. From 245 to 219 B.C. it was under the rule of the Ptolemies. It was the harbor of Antioch. In the first century A.D. it was annexed by Rome, which used it as a major anchorage for its fleets. In the fifth and sixth centuries A.D. the city fell into decline. Seleucia Pieria was devastated by an earthquake in A.D. 526 and finally destroyed in the Persian and Arab conquests of the sixth and seventh centuries, respectively.