Hagia Sophia is considered a unique monument in world architecture, and its magnificence and functionality has been a good example in construction of countless Ottoman mosques. Hagia Sophia with its exceptional history constitutes a synthesis between east and west. This monument is one of the wonders of the world that has remained intact until the present day. One can find many attractions in Hagia Sophia interesting forms of Byzantine architecture, mosaics of the Christian period as well as structures added during the Ottoman era.   During the reign of emperor Theodosius Hagia Sophia was built for the second time and opened to the public in 415 AD. The basilica was again burned down during the Nika Revolt in 532 AD. Some ruins of this building were discovered during excavations in 1936. There were stairs indicating the entrance of the building, columns, capitals and other fragments of the building.

Hagia Sophia has been a Christian place of worship for 916 years, then converted into a mosque and served Muslims for 481 years. Hagia Sophia Museum was opened in 1935 and ever since it has been attracting thousands of visitors every year.