Hagia Sophia Istanbul: Complete Visitor Guide (Tickets, Hours, Dress Code)

Quick Answer: The Hagia Sophia (Ayasofya) in Istanbul is a 1,500-year-old architectural marvel, now serving as an active mosque. As of 2024, foreign tourists must use a separate entrance to the upper gallery for a fee of €25 , while the ground-floor prayer hall is free but reserved for worshippers. A strict dress code (shoulders, knees, and women's hair covered) is enforced. Plan 60–90 minutes to explore its colossal dome and stunning Byzantine mosaics, and book a guided tour to navigate the new entry system and fully appreciate its complex history. Book a Hagia Sophia Tour Skip the ticket lines, mosaic hunts and Sultanahmet logistics. Our licensed guides run private Hagia Sophia tours daily — mainland and gallery access included where open. Request a Private Tour What Is Hagia Sophia and Why Is It Famous? The Hagia Sophia Grand Mosque (Ayasofya-i Kebir Cami-i Şerifi) is arguably the most significant structure in Istanbul and a masterpiece of world architecture. Its fame stems from nearly 1,500 years of tumultuous history and its revolutionary design. Originally consecrated in 537 AD by the Byzantine Emperor Justinian I, it was the largest cathedral in the world for nearly a millennium, a symbol of Byzantine power and Christian orthodoxy. The name "Hagia Sophia" means "Holy Wisdom" in Greek. Its most iconic feature is its colossal central dome, which appears to float weightlessly above the nave, an engineering feat thought impossible at the time. This was achieved through the use of pendentives—triangular segments of a sphere that allow the placement of a circular dome over a square room. After the Ottoman conquest of Constantinople in 1453 by Sultan Mehmed II, it was converted into an imperial mosque, and minarets were added to its profile. In 1934, the founder of the Turkish Republic, Mustafa Kemal Atatürk, secularized the building, transforming it into a museum. This allowed for the restoration and public display of its magnificent Byzantine Christian mosaics, wh