Hagia Sophia

Hagia Sophia (the holy wisdom) was a church in Constantinople (today's Istanbul), built 532-537 under emperor Justinian I, most important in early orthodox Christianity and the Byzantine Empire. Its named architects were Isidore of Miletus and Anthemius of Tralles. It was converted to a mosque at the fall of Constantinople to the Ottoman Turks under Sultan Mehmet II in 1453 and to a museum in the 20th Century.

There is also a Hagia Sophia in Kiev.