Answer :
The Hagia Sophia is B) a church building recognized as a great architectural achievement of Justinian's reign. It was an Eastern Orthodox Cathedral, which was then converted to an Imperial Mosque and then secularized as a museum.It is located in Istanbul, which is one of Turkey's largest cities. When it was a mosque, it served as an inspiration for many other mosques and when it was church, because of it's massive dome, it is said to changed the history of architecture forever.
B. a church building recognized as a great architectural achievement of Justinian's reign
I visited the place while I was in the air force, it is in Istanbul, Turkey.
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