Hagia Sophia in Istanbul

About Hagia Sophia in Istanbul

Hagia Sophia — **the Church of Holy Wisdom** — is **the most consequential building in the history of architecture**. When the Byzantine Emperor **Justinian I commissioned its construction in 532 AD**, following the burning of the earlier cathedral during the Nika riots, he demanded a building that would surpass everything before. His architects, **Anthemius of Tralles and Isidorus of Miletus — both mathematicians rather than conventional builders** — delivered something unprecedented: **a dome 31 metres in diameter and 55 metres above the floor**, apparently floating above a ring of 40 windows. When Justinian first entered the completed building in **537 AD**, he is said to have exclaimed: **'Solomon, I have surpassed you.'** For **nearly a thousand years, Hagia Sophia was the largest cathedral in the world** and the architectural model against which all subsequent domed buildings were measured. When the Ottoman Sultan **Mehmed II entered Constantinople on 29 May 1453**, he went directly to Hagia Sophia, performed Islamic prayers within it, and **converted it to a mosque**. The Byzantine mosaics were plastered over and four minarets added. **In 1934, Atatürk converted it to a secular museum**, uncovering the mosaics. **In 2020, the Turkish government reconverted it to a mosque**; it remains open to non-Muslim visitors outside prayer times. Hagia Sophia is in the **Sultanahmet district of Istanbul**, directly opposite the Blue Mosque and a short walk from the **Topkapi Palace**. Admission is now **free since reconversion to a mosque**, but modest dress and removing shoes are required. Best visited at opening on a weekday in **spring or autumn**; summer queues can be very long. Istanbul itself — the Topkapi Palace, the **Grand Bazaar**, the Dolmabahçe Palace, **the Bosphorus crossing**, and the extraordinary food culture — easily fills a week. **No city in the world sits at a more dramatic cultural and geographical crossroads**.

Highlights

• ✦ Originally a cathedral (537 AD), then mosque, now museum/mosque
• ✦ Massive dome spans 31 m, revolutionary for its era
• ✦ Stunning Byzantine mosaics alongside Islamic calligraphy

Practical info

Frequently asked questions

Is Hagia Sophia a mosque or a museum?

It functions as an active mosque again since 2020, after decades as a state museum; the ground floor operates as a working prayer hall while non-Muslim visitors can view it from a marked walkway outside prayer times. The upper gallery, which holds most of the famous Byzantine mosaics, remains open to sightseers for a separate entry fee.

How much does it cost to visit Hagia Sophia?

Entering the ground-floor prayer hall is free for everyone, but access to the upper gallery with the mosaics requires a paid ticket, bought online or at the on-site counter. Expect queues at the security check, especially mid-morning in high season.

What should you wear when visiting Hagia Sophia?

Shoulders and knees should be covered, and women need a headscarf to enter the prayer hall — scarves are usually available to borrow at the entrance. Shoes must come off before stepping onto the carpeted prayer area, so wear something easy to slip on and off.

When is the best time to visit Hagia Sophia to avoid crowds?

Early morning right after opening or the last hour before closing tends to be quietest, since large tour groups cluster around midday. Visiting outside the five daily prayer times also avoids the temporary closures of the ground floor.

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