The current Hagia Sophia is the third construction, done in a different architectural style, even though it occupies the same location as the previous two.
The original building was constructed by the most important architects of the period (527-565), Anthemios (Tralles) and Isidoros (Miletus), under the order of Emperor Justinianos.
It is mentioned in the resources that during its construction period, the two prominent architects each had 100 architects working under them, who in turn had 100 workers each working under them.
It was used as a church for 916 years but, following the conquest of Istanbul by Fatih Sultan Mehmed, the Hagia Sophia was converted into mosque.
Afterwards, it was used as a mosque for 482 years.
Under the order of Atatürk and the decision of the Council of Ministers, Hagia Sophia was converted into a museum in 1935. Hagia Sophia is open for visit every day.
The winter visiting hours for the Hagia Sophia are from 09.00 to 17.00, with the final entry being at 16.00.
During the summer, the visiting hours are between 09.00 and 19.00, with the final entry being at 18.00.
Passes are available at the box office in the museum.