Hagia Sophia, an outstanding and still surviving example of ancient architectural works is also important for the world of arts with its architecture, splendour, magnitude and functionality.

Hagia Sophia is largest church of Eastern Roman Empire built in İstanbul and was rebuilt three times at the same place. The first church to occupy the site was called as Megale Ekklesia (Great Church) and the church began to be named as Hagia Sophia (Holy Wisdom) after 5th century. Hagia Sophia had been the imperial cathedral as the largest church in the capital city where the emperors were being crowned.

Hagia Sophia was converted to a mosque after Sultan Mehmet I the Conqueror conquered Istanbul in 1453. After the conquest the building was reinforced and preserved with new additions in service as a mosque during Ottoman era.