San Julián de los Prados, also known as Santullano, is a Pre-Ramirense church from the beginning of the 9th century in Oviedo, the capital city of the Principality of Asturias, Spain. It is one of the greatest works of Asturian art and was declared an Historical-Artistic Monument by the Spanish Ministry of Culture in June 1917 and a World Heritage Site by UNESCO on 2 December 1998.
The church's construction was ordered by Alfonso II of Asturias and it was built by the court architect Tioda c. 830. It is dedicated to the martyred Egyptian saints Julian and Basilissa.
Wikipedia https://en.wikipedia.org/wiki/San_Julián_de_los_Prados
Address Calle de Selgas, 2, 33011 Oviedo, Spain
Coordinates 43°22'3.697" N -5°50'14.222" E