Hagia Sophia, Istanbul: visitor guide

What to expect at Hagia Sophia

Hagia Sophia is the most important building in Istanbul and one of the most significant structures in the history of world architecture, a cathedral completed in 537 AD under the Byzantine Emperor Justinian I that stood for nearly a thousand years as the largest interior space ever enclosed by human engineering. Its central dome, 31 metres in diameter and rising 55 metres above the floor, appeared to ancient and medieval visitors to float miraculously on light rather than resting on walls, an effect created by the ring of 40 windows at the dome's base that flood the interior with Mediterranean light. When it was completed, Justinian reportedly said: 'Solomon, I have surpassed thee.'.

The building has served three distinct religious functions across its 1,500-year history. From 537 to 1453 it was the patriarchal cathedral of Constantinople and the spiritual heart of the Eastern Orthodox Church. The church where Byzantine emperors were crowned, where church councils debated the nature of Christ, and whose influence shaped Orthodox Christianity's architecture across Russia, Greece and the Balkans. After the Ottoman conquest of Constantinople in 1453, Sultan Mehmed II converted it to a mosque, adding the four minarets that now define Istanbul's skyline and covering the Christian mosaics with plaster. In 1934, Atatürk's government converted it to a secular museum. Also, in 2020 it was reconverted to an active mosque by the Turkish government.

Byzantine mosaics

The Byzantine mosaics visible in the upper galleries are among the best surviving examples of Byzantine art, the Deësis mosaic (Christ flanked by the Virgin Mary and St John the Baptist, c.1261) counts as the single top Byzantine mosaic in existence, its gold background creating an unearthly luminosity and the psychological depth of the three faces representing a radical development in medieval religious art. The mosaics were hidden under Ottoman plasterwork for centuries and were rediscovered during the museum period. In fact, the upper galleries, reached by a ramp from the ground floor, give the best interior views of the dome and the full spatial drama of the building.

Entry to the site is free as an active mosque, but visitors must dress appropriately (women must cover hair and shoulders. All visitors must remove shoes at the entrance). The building is busiest between 10 AM and 3 PM, arriving at opening (9 AM) or after 4 PM gives far better access to the mosaics in the upper gallery and a more contemplative interior experience. In addition, the adjacent Sultanahmet Square (the ancient Hippodrome of Constantinople), Topkapi Palace (20 minutes' walk) and the Blue Mosque (directly across the square) form a triangle of first-rank Ottoman and Byzantine heritage all within walking distance. Besides, the combination of these sites in a single day gives the fullest available introduction to Istanbul's 1,500-year history as a world capital.

Sultanahmet neighbourhood

The Sultanahmet neighbourhood surrounding the site is one of the best urban heritage areas in Europe and the Middle East, the visible archaeology of the ancient Hippodrome (the Egyptian Obelisk of Thutmose III, the Serpent Column from Delphi, and the Column of Constantine still standing in the original race track alignment), the elaborate fountains and sebils of the Ottoman period, and the 19th-century residential character of the surrounding streets give the area a layered historical density unmatched in Istanbul's other neighbourhoods. Arriving in Sultanahmet early morning and walking its streets before the tour groups arrive from the cruise terminal is a good idea for the quality of the experience.