Like most cathedrals in Spain, this one took a few centuries to build, and it shows. The bottom half was built in traditional Romanesque style, looking more like a fortress than a cathedral. By the time they got around to the ceiling, styles had changed, so they built an airy Gothic top on the Romanesque bottom. The same slapdash approach is apparent on the facade, where they only got around to building the left belltower before getting bored, leaving a lopsided church for future generations to enjoy. The thrifty citizens also economized in another way, by using the back of the church a part of the city wall.