Hagia Sophia Istanbul: Complete Visitor Guide

Hagia Sophia is one of the most extraordinary buildings in human history — a 6th-century Byzantine cathedral converted to a mosque by Mehmed II in 1453, transformed into a museum in 1934, and restored to mosque status in 2020. For nearly a thousand years after its construction in 537 CE, it was the largest cathedral in the world, its 31-metre dome a feat of engineering so audacious that contemporary observers believed it was suspended from heaven by a golden chain. The interior is overwhelming in scale and beauty: ancient gold mosaics of Christ and the Virgin Mary peer through layers of whitewash and Arabic calligraphy; the imperial gate where Byzantine emperors once entered is worn smooth by a millennium of touch. Entry is now free but requires modest dress — shoulders and knees must be covered. Prayer times close certain areas to visitors. The best viewing experience is from the upper gallery, where the full sweep of the dome is visible and the famous Deësis mosaic can be seen up close.