Capitals of the Ottoman Empire

Edirne (; ), historically known as Orestias, Orestiada, Adrianople, or Adriana is a city in Turkey, in the northwestern part of the province of Edirne in Eastern Thrace. Situated from the Greek and from the Bulgarian borders, Edirne was the second capital city of the Ottoman Empire from the 1360s to 1453, before Constantinople became its capital.

Bursa is a city in northwestern Turkey and the administrative center of Bursa Province. It is the fourth-most populous city in Turkey and second-most populous in the Marmara Region after Istanbul. According to 2025 end of year estimate, the province has a population of 3,263,011 while Bursa city has a population of around 2.5 million. Bursa is one of the centers of Turkey's automotive production, becoming an industrial center of the country. The city provides various places of interest.

Constantinople (see other names) was a historical city located on the Bosporus, which served as the capital of the Roman, Byzantine, Latin, and Ottoman empires between its consecration in 330 and the formal abolition of the Ottoman sultanate in 1922. Constantinople was founded in 324, initially as New Rome, during the reign of Constantine the Great on the site of the existing settlement of Byzantium and in 330 became the capital of the Roman Empire. Following the collapse of the Western Roman Empire in the late 5th century, Constantinople remained the capital of the Eastern Roman Empire (also

Söğüt (, ) is a town in Bilecik Province, Turkey. It is the seat of Söğüt District. Its population is 13,566 (2021). The mayor is İsmet Sever (MHP), elected in 2019.

Nicaea (also spelled Nicæa or Nicea, ; ), also known as Nikaia (, Attic: , Koine: ) or Nice ( or ), was an ancient Greek city in the northwestern Anatolian region of Bithynia.