The Bulgarian St Stephen Church (Bulgarian: Църква „Свети Стефан“; Turkish: Sveti Stefan Kilisesi), also known as the Bulgarian Iron Church, is a Bulgarian Orthodox church in Istanbul, Turkey, famous for being made of cast iron. The church belongs to the Bulgarian minority in the city. The Bulgarians of the Ottoman Empire used to pray at the churches of the Phanar Orthodox Patriarchy, but due to nationalistic movements, Bulgarians were allowed a national church in the 19th century, the Bulgarian Exarchate.
Istanbul (historically Byzantium and later Constantinople; see the other names of Istanbul) is the largest city of Turkey and the third largest city in the world. The city covers 27 districts of the Istanbul province.It is located on the Bosphorus Strait and encompasses the natural harbor known as the Golden Horn, in the northwest of the country. It extends both on the European (Thrace) and on the Asian (Anatolia) side of the Bosphorus, and is thereby the only metropolis in the world which is situated on two continents. In its long history, Istanbul served as the capital city of the Roman Empire (330–395), the East Roman (Byzantine) Empire (395–1204 and 1261–1453), the Latin Empire (1204–1261), and the Ottoman Empire (1453–1922). The city was chosen as joint European Capital of Culture for 2010. The historic areas of Istanbul were added to the UNESCO World Heritage List in 1985.