The Church of St. Mary at Mount Naranco is located 2.5 miles from Oviedo, Spain. In 848 AD, Asturian King Ramiro I, constructed this building to serve as his royal palace. The Church of St. Mary is deliberately close to the Church of St. Miguel de Lillo as they were part of the same complex. During the 13th century, the Church of St. Mary at Mount Naranco was converted from a palace into a Catholic Church. The Church of St. Mary at Mount Naranco is an excellent example of Asturian pre-Romanesque architecture. The church contains a lower level that houses the crypt and an upper level that can be reached by the external staircase. Other architectural features include transverse ribs, columns, and arch medallions with pictures of horseback riders and warriors. In 1985, UNESCO declared the Church Of St Mary At Mount Heritage Site.