was a minor trade center on the famous Royal Road which was built during the reign of Persian King Darius I ( 522-486 B . C .). After Gordion , King of Macedonia , Alexander the Great ( 336-323 B . C .) came to this place in 333 B . C . and ended the Persian domination in the Anatolia . It is known that Tetosags , a tribe of Galatians who came to the Anatolia from Europe between 278-277 B . C . made Ankara their capital city . Roman Empire Augustus defeated Galatians in the 25 B . C . from Galatians , joined the region to the Roman Empire and declared the city as the capital of Galatian province .
Ankara in the 1st and 2nd century A . C . became a very imporant junction in the Roman road network in the Anatolia and was a developed city in terms of administrative and military functions .
When in 395 B . C . the Roman Empire was divided into two , Ankara region remained under the rule of Eastern Roman Empire ( Byzantine ) and preserved