This church, called Hagia Sophia, is located in Istanbul, Turkey and was constructed in 535 A.D. Hagia Sophia, or the Church of the Holy Wisdom, is 180 ft high and was built with a dome on dome technique. The uppermost dome, 108 ft in diameter, has a series of forty windows to catch the sunlight from practically every angle. At the time of construction, Hagia Sophia was in Constantinople, but because of the fall of the Roman Empire the land was taken over by the Muslims thus the name change to Istanbul. Hagia Sophia is thought of as one of the supreme achievements in the history of architecture in the world.