Hagia Sophia

Hagia Sophia, whose name means “Holy Wisdom,” is one of Istanbul’s most important landmarks and one of the greatest architectural achievements of the ancient world. The building brings together nearly 1,500 years of Eastern Roman and Ottoman history, reflecting the different cultures and empires that shaped Istanbul. The present Hagia Sophia is the third structure built on the same site. Commissioned by Eastern Roman Emperor Justinian I, it was designed by the celebrated architects Anthemius of Tralles and Isidore of Miletus. Construction began in 532 and was completed in 537, taking less than six years—an extraordinary achievement considering the scale and complexity of the monument. For more than nine centuries, Hagia Sophia served as the principal cathedral of Constantinople and stood at the centre of the religious and ceremonial life of the Eastern Roman Empire. Following the Ottoman conquest of Constantinople in 1453, Sultan Mehmed II converted the building into a mosque. Minarets, a mihrab, a minbar, monumental calligraphic panels and other Ottoman elements were added over the following centuries, creating the remarkable combination of Christian and Islamic art visible today. Its most impressive feature is the vast central dome, which appears to float above the interior as natural light enters through the windows beneath it. The immense open space, marble columns, golden Byzantine mosaics, decorated vaults and large Ottoman calligraphic medallions make the interior one of the most memorable sights in Istanbul. Some of the Byzantine mosaics survived for centuries beneath layers of plaster and were later uncovered. Hagia Sophia did more than transform Istanbul’s skyline—it changed the history of architecture. Its innovative dome and spatial design influenced generations of churches and later inspired the development of major Ottoman mosques. UNESCO recognises it as a unique masterpiece of Byzantine and Ottoman architecture, and it forms part of the Historic Areas of Istanbul, inscribed on the UNESCO World Heritage List in 1985. The building became a museum in 1935 and returned to use as a mosque in 2020. Today, Hagia Sophia remains an active place of worship as well as one of Istanbul’s most significant historical, cultural and architectural treasures. Visitors should dress modestly, remain respectful and follow the instructions displayed at the entrance.