Nisibis

Nisibis, the capital of ancient Mygdonia, the north-eastern part of Mesopotamia, was a city of great antiquity, and was of importance both as a place of strength and as an emporium of the trade between the east and west. It was twice taken by the Romans (under Lucullus and Trajan), and again given up by them to the Armenians; but being a third time taken, in 165 A.D., it remained the chief bulwark of the Roman empire against the Persians, till it was surrendered to them after the death of Julian in 363. The name Nisibin is retained by a small village in the Turkish province of Diarbekir, round which are numerous remains of the ancient city.