The Hagia Sophia was built under Emperor Justinian in the A. 6th Century
B. 10th Century
C. 5th Century
D. 7th Century

A. 6th century an important Byzantine structure in Istanbul and one of the world’s great monuments. It was built as a Christian church in the 6th century CE (532–537) under the direction of the Byzantine emperor Justinian I. In subsequent centuries it became a mosque, a museum, and a mosque again.

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