It is built on a previous construction dating from the 13th century, and has a doorway with interesting sculptures. The Cathedral of Santa María originated as a church-fortress in the early 13th century. Construction was subsequently completed in the Gothic style in several stages throughout the 14th and 15th centuries. http://www.spain.info/en_IN/que-quieres/arte/monumentos/alava/catedral_de_santa_maria.html