Ancyra was the centre of the Tectosages, one of the three Gaulish tribes which settled in Galatia in the 3rd century B.C., and became the capital of the Roman province of Galatia when it was formally constituted in 25 B.C. During the Byzantine period, throughout which it occupied a position of great importance, it was captured by Persians and Arabs; then it fell into the hands of the Seljuk Turks, was held for eighteen years by the Latin Crusaders, and finally passed to the Ottoman Turks in 1360.
At Ancyra (about 235 ?) Seleucus sustained a crushing defeat and left the country beyond the Taurus to his brother and the other powers of the peninsula.
The only man who tried to shake off the theological influence of Origen was Marcellus of Ancyra, who did not succeed in producing any lasting effect on theology.
Meanwhile the Palmyrenes were pushing their influence not only in Egypt but in Asia Minor; they contrived to establish garrisons as far west as Ancyra and even Chalcedon opposite Byzantium, while still professing to act under the terms of the joint rule conferred by Gallienus.