Palencia Cathedral is a Roman Catholic church, dedicated to Saint Antoninus of Pamiers. The cathedral was built from 1172 to 1504 and stands over a low vaulted Visigothic crypt (the Crypt of San Antolín). It is a large Gothic building, popularly dubbed as "The unknown beauty" because not as well known as other Spanish cathedrals, though, it is a valuable building which has in its interior a large number of works of art of great value.