Hagia Sophia in 3D - 360° Video | ANCIENT INVISIBLE CITIES | PBS

#InvisibleCitiesPBS Explore the Hagia Sophia. Built by the Romans 1,500 years ago, it was the biggest church in the world. No expense was spared: colored marble from around the Roman Empire and nearly 10,000 square meters of gold mosaic. In 1453, the Hagia Sophia was turned into a mosque after Ottoman Turks conquered the city. Now a museum, it has survived earthquakes, sieges and the rise and fall of empires. Yet Hagia Sophia still stands, the ancient jewel in the crown of Istanbul. ANCIENT INVISIBLE