North Facade. On the facades, in the form of a cornice, there is a stone checkerboard decoration at different heights. Under the eaves, we discover more than 300 small corbels, with figures similar to gargoyles, representing animals, human beings and mythological or fantastic beings.

The exterior appearance of the church is characteristic of the Romanesque period. The octagonal dome of the transept and the two cylindrical towers located on either side of the main façade stand out against the lower naves. The three naves, barrel-vaulted, the central one wider and higher than the lateral ones, end with three semicircular apses.