The church at Constantinople, dedicated to the ‘Holy Wisdom’ (i.e. the Person of Christ), was built under Justinian and consecrated in 538. Its chief feature is the huge dome which crowns the basilica. In 1453 the Turks converted the church into a mosque and its mosaics were covered up and partly destroyed. Discovered during restoration work, they were restored in the 20th century. Since 1935 the church has been a museum.