The Cathedral of the Savior (Spanish: Catedral del Salvador) or La Seo de Zaragoza is a Roman Catholic cathedral in Zaragoza, in Aragon, Spain. It is part of the World Heritage Site Mudéjar Architecture of Aragon. The cathedral is located on the Plaza de la Seo and is commonly known as La Seo (Spanish for "see") to distinguish it from the nearby El Pilar, whose name (pillar) is a reference to an apparition of Mary in Zaragoza (also known as Saragossa). They both share co-cathedral status in metropolitan Zaragoza.