Hagia Sophia reopened for Friday prayers last week for the first time since a decision was made to turn it back into a mosque after more than 80 years as a museum.
The Hagia Sophia was the Roman Empire's first Christian cathedral and is among the best-known Byzantine structures in the world. It switched from a Greek Orthodox cathedral to a mosque after the Ottoman conquest in 1453.
The historic site then became a museum in 1935 as part of a decree by modern Turkey's secularist founding father Mustafa Kemal Ataturk.