Hagia Sophia stands on the site of an earlier basilican church erected by Constantius II in 360, some 30 years after Byzantium had become the capital of the Roman Empire.

• 圣索菲娅大教堂由君士坦丁二世于360年建立，竖立在一座更早期的长方形基督教堂的遗址上，拜占庭帝国成立三十年后成为罗马帝国的首都。