Once a mosque and now a museum, the Hagia Sophia was originally a Byzantine cathedral, built in 537. It is universally acknowledged as one of the great buildings of the world.
Completion of the Hagia Sophia under Constantius
- 15 Jan 532
Nika Riots in Constantinople
- 24 Dec 537
Hagia Sophia Completed
- 7 May 558
Dome of the Hagia Sophia collapses