Hagia Sophia, Turkish Ayasofya, Latin Sancta Sophia, also called Church of the Holy Wisdom or Church of the Divine Wisdom, 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. The building reflects the religious changes that have played out in the region over the centuries, with the minarets and inscriptions of Islam as well as the lavish mosaics of Christianity.
