Sincan, Ankara Sincan, Ankara Sincan is a metropolitan district of Ankara Province in the Central Anatolia region of Turkey, a large town 27 km from the city of Ankara. According to 2010 census, the population of Sincan is 456,420 The district covers an area of , and the average elevation is . Sincan has friendly relations with the municipality of Doboj Jug from Bosnia and Herzegovina. Sincan District hosts ASO 1. Organize Sanayi Bölgesi, the biggest Organized Industrial Zone in Ankara, operated by Ankara Chamber of Industry. Sincan stands on a plain surrounded by hills and watered by the Ankara River, a
History of Ankara tetrarchy, a system of multiple (up to four) emperors introduced by Diocletian (284-305), seems to have engaged in a substantial programme of rebuilding and of road construction from Ankara westwards to Germe and Dorylaeum (now Eskişehir). In its heyday, Roman Ankara was a large market and trading center but it also functioned as a major administrative capital, where a high official ruled from the city's Praetorium, a large administrative palace or office. During the 3rd century, life in Ancyra, as in other Anatolian towns, seems to have become somewhat militarised in response to the invasions and instability of the town.