Patron: Emperor Justinian I]]> 537 - Construction is completed
1453 - Constantinople falls to Ottoman forces and is converted from an Orthodox Christian church to a mosque
1919 - While under occupation during World War I by the British, French, Italian, and Greek forces, a Divine Liturgy is performed and the mosque is converted back into a church
1935 - Mustafa Kemal Atatürk, Turkish President and founder of the Republic of Turkey, converts the building into a museum
2020 - Hagia Sophia is reclassified as a mosque]]>