Hagia Sophia
Fifteen centuries of Byzantine and Ottoman brilliance beneath a single vast dome — one of the great buildings of humanity.
Inaugurated by Emperor Justinian I in 537 CE, Hagia Sophia ('Holy Wisdom') was the largest cathedral on earth for nearly a thousand years. Legend says Justinian entered the finished building and cried, 'Solomon, I have surpassed thee!' Its 31-meter dome seemed to float on light, and it remained the spiritual heart of Eastern Christianity until 1453, when Sultan Mehmed the Conqueror entered Constantinople and transformed it into an imperial mosque. Minarets, mihrab and calligraphic medallions were added while gold Byzantine mosaics were carefully preserved. After serving as a museum from 1934, it was reopened as a mosque in 2020 — layered, sacred, and unlike anything else.
Hagia Sophia's central dome — 31 meters across and 55 meters high — held the record as the world's largest for almost 1,000 years, until the Duomo of Florence was completed in 1436.