This sacred place of Christianity was transformed into a sacred place of Islam in Ottoman times. It is certain that some of the legends told about have increased this sanctity. Therefore, many Ottoman sultans built their tombs in the courtyard of Hagia Sophia. You can see the fountain in the garden of Hagia Sophia was built in 1740 by I. Mahmut. It is possible to see the baroque features in the decorations and fringe arrangements as it corresponds to a period of transition from Ottoman art to the European influential architecture. The mosaics, which were unearthed after the Hagia Sophia was turned into a museum, were produced in the most beautiful examples of Byzantine art and in different periods from the 9th to 12th centuries. The most striking examples of Ottoman calligraphy can also be seen in Hagia Sophia.