The Comnenus mosaics date from 1122. The Virgin Mary is standing in the middle, depicted, as usual in Byzantine art, in a dark blue gown. She holds the child Christ on her lap. He gives his blessing with his right hand while holding a scroll in his left hand. The Hagia Sophia was the largest and most admired cathedral in Christianity for almost a thousand years. The current building was originally constructed between 532 and 537 on the orders of the Byzantine Emperor Justinian. The main dome collapsed during the earthquake of 558. It was rebuilt immediately, giving the building its current interior height of 55.6 meters (182 feet). The church was rededicated in 562. Over time, the Hagia Sophia suffered damage due to earthquakes, war, and neglect, and it was restored periodically. The famous mosaics were plastered over after the Ottoman conquest of 1453 and only recovered in the 20th century.