The back of the Catedral de la Immaculada also called The New Cathedral.
Wiki tells us about the cathedral: “Construction works started in 1885 and lasted for almost a century. This building combines many architecture styles, but Romanesque Revival is predominant. The cathedral is surmounted by three giant domes covered by striking blue and white glazed tile from Czechoslovakia. Its stained glass windows were created by Spanish artist Guillermo Larrazábal.”