Hagia Sophia
Hagia Sophia stands in the Fatih district of Istanbul — a mosque that began its life as a cathedral. Built by the Byzantine Emperor Justinian I between 532 and 537 CE, it was designed as a basilica and served for a thousand years as the seat of the Ecumenical Patriarch, the spiritual center of Eastern Orthodox Christianity. After the Ottoman conquest of Constantinople in 1453, Sultan Mehmed II converted it into a mosque. It was secularized as a museum from 1935 to 2020, when it became a mosque again. Its fusion of basilica plan and centralized dome — and the engineering that holds it up — marks a turning point in architectural history. Step inside and take time to find the corners everyone passes but no one stops to read.
- Founded
- 537
- Architect
- Isidore of Miletus, Anthemius of Tralles
- Architectural style
- Byzantine architecture
Turkey · 3 The overlooked corners inside
The overlooked corners inside
Exterior Buttresses
Walk around the outside walls of Hagia Sophia and you'll see massive slabs of masonry propped against the building at an angle — these are the buttresses (payanda in Turkish). They are not decoration. From the moment it was completed, the great dome has been trying to push the walls outward in every direction, and the buttresses are what stop it. Twenty-four surround the building today, some Byzantine in origin and some Ottoman, old and new side by side. The most critical group were added by Mimar Sinan, the chief imperial architect of the Ottoman Empire.
From Mosque to Museum: The Republican Era
The Hagia Sophia you visit today spent decades as a museum — and that identity is itself a piece of modern history. After the fall of the Ottoman Empire, the building lost the prestige of an imperial great mosque; it no longer stood above all others in Turkey. When Mustafa Kemal Atatürk came to power, he continued restoration work and in 1931 handed the project to the American Byzantine Institute. The building was then converted into a museum and opened to the public — a transformation widely read as an emblem of the new secular republic.
Sources: fr.wikipedia.org
Mosaics
Inside the inner narthex, look up: the ceiling is entirely covered in mosaic, and the panels glinting yellow are set with real gold. The walls are lined with veined marble brought from quarries across Anatolia and beyond. Each slab was split in half before being fixed to the wall, then the two halves were opened out and hung side by side — like unfolding an ink-blotted page — creating a natural mirror symmetry. The most rewarding place to stop is above the Imperial Gate, the central door connecting the inner narthex to the main hall, reserved for the emperor alone.
Sources: tr.wikipedia.org
FAQ
What overlooked corners are worth seeing inside Hagia Sophia?
Exterior Buttresses, From Mosque to Museum: The Republican Era, Mosaics and more — 3 spots in all, each with sources and a guide in your language to read or listen to on the spot.
Is the Hagia Sophia guide free?
All 3 guides are free.