The church designed by Pere de Coma is a Latin cross basilica with three naves and a pronounced transept that opens into five apses. At the intersection of the arms of the cross, the dome rises, with an octagonal top view over squinches. Its originality lies in the double wall that completely surrounds it.

Regular and symmetrical, the building designed by Pere de Coma imposes solemnity. The perfect interdependence between cruciform Romanesque pillars and the Gothic groin vaults resulted in a spacious and monumental space full of richness. The sixteen columns that surround the strong support pillars give clear proof of the transition to Gothic and at the same time they display a clear affection for the sculptural embellishment that can be found on the windows and portals.

The main Romanesque facade connects with the cloister and has three gates. The sides are simpler, with the centre receiving all the attention. The gate of the central nave, or the Main Portal, defines the model of the so-called School of Lleida, without a tympanum but with extravagantly decorated archivolts in degradation.