- In 1453, the Ottoman Empire took over Constantinople and the Hagia Sophia was taken over by Sultan Mehmed. For the first time in its history, the Islamic Friday prayers were sounded from the Hagia Sophia, marking it as a mosque.
- The troops pillaged and took over the Hagia Sophia as their spoils of war
- Plans to renovate the Hagia Sophia then came about, where old Christian relics and designs were taken down and replaced with Islamic elements, like the minarets
- Further restorations took place under Sultan Abdulmejid until 1849, where large medallions, New-Byzantine columns and Ottoman marble was added
- In 1935, the Republic of Turkey designated the site as the Hagia Sophia Museum. In 2018, the museum was re-designated as the Hagia Sophia Mosque.





