Collegiate Church of Santa María de Xàtiva Monument · Xàtiva, La Costera, Valencia Also known as La Seu, it was built in the 16th century on the site of a former mosque; a Monumento Nacional (Spain's heritage designation in force until 1931) since 1931 and a minor basilica since 1973. Photo: Endonartex (CC0) What to see and do in Xàtiva