The moment
After rioters burned the old cathedral in 532, Justinian I had a new Church of Holy Wisdom raised in about five years, its vast dome floating above marble and gold mosaic. It served as the cathedral of Constantinople until the Ottoman conquest of 1453, then as a mosque, from 1935 as a museum, and since 2020 as a mosque again.
People: Justinian I, Anthemius of Tralles, Isidore of Miletus