The interior of the church had some peculiar features, due to the evolution of styles over the centuries. The oldest parts of the church, the Romanesque bell tower and portal at the west end, were slightly out of alignment with the nave and the rest of the church. The nave was Romanesque on its lower levels, with rounded arches and windows and engaged pillars and columns, but Gothic at the top level, with four-part rib vaults installed in the middle of the 17th century.Dumoulin (2010), p. 115
