The Church of Saint Sophia is the second oldest church in Sophia, dating back to the 6th century. In the 14th century, the city of Sophia was named after the Church of Saint Sophia. The Church of Saint Sophia was built on the basis of several original churches. In the 2nd century AD it was a Roman theater. Now the main house, as well as two towers and a domed tower on the east side, was built during the reign of Justin I of Byzantine Kings in the mid-6th century. One of the most precious early church buildings in southeastern Europe, the church floors are intricately decorated with early Christian or mosaic patterns of flowers and animals, and the ground and surrounding areas are covered with tombs that were earlier than the church was built. It is believed that the Church of Saint Sophia has been protected by mysterious forces, and has not been damaged by human aggression and natural disasters for centuries, and is a representative of the elegant, simple, symmetrical beauty of the building.