The Cathedral of Santo Domingo de la Calzada origins date back to 1158, when building work began. In the 14th and 16th centuries it underwent various modifications until it attained its current appearance. It has three naves with a transept, ambulatory, triforium and an ogival vaulted ceiling. Highlights on its exterior include the Romanesque apse, Baroque tower and the south or 'Santo' entrance, with a semi-circular arch, images set in niches and circular skylights.

THE TOWER: This tower is the third one that the temple had, since the primitive Romanesque one was destroyed after a fire in 1450, and the later Gothic one had to be dismantled, due to the danger of collapse that it represented, at the end of the 17th century.