How many times hagia Sophia built?

The Hagia Sophia was originally constructed as a cathedral in 537 AD during the reign of Emperor Justinian I. It underwent significant modifications and restorations over the centuries, particularly after being damaged by earthquakes. In 1453, after the Ottoman conquest of Constantinople, it was converted into a mosque. Today, it serves as a museum and a mosque, reflecting its rich and diverse history, but it has only been built once as a structure.