Ankara Treaty of Lausanne (1923), the Turkish nationalists replaced the Ottoman Empire with the Republic of Turkey on 29 October 1923. A few days earlier, Ankara had officially replaced Constantinople as the new Turkish capital city, on 13 October 1923. After Ankara became the capital of the newly founded Republic of Turkey, new development divided the city into an old section, called "Ulus", and a new section, called "Yenişehir". Ancient buildings reflecting Roman, Byzantine, and Ottoman history and narrow winding streets mark the old section. The new section, now centered on Kızılay Square, has the trappings of a more modern city:
Ankara in the Sincan district of Yenikent, outside the city center. Ankara has a large number of minor teams, playing at regional levels. In the TFF Second League: Bugsaşspor in Sincan, Ankara Demirspor in Çankaya, Etimesgut Belediyespor in Etimesgut, Keçiörengücü in Keçiören; in the TFF Third League: Ankara Adliyespor in Keçiören; Altındağ Belediyespor in Altındağ; in the Amateur League: Turanspor in Etimesgut, Türk Telekomspor owned by the phone company in Yenimahalle, Çubukspor in Çubuk, and Bağlumspor in Keçiören. In the Turkish Basketball League, Ankara is represented by Türk Telekom, whose home is the Ankara Arena, and CASA TED Kolejliler, whose home