Decoration plays a secondary role, with a very isolated, schematic presence in Rogent's architecture.
- The most common decorative elements are round arches, archivolts supported on corbels, cornices and mouldings.
- Curved lines predominate in decorative elements as, according to Rogent, they serve to create beauty.
- The use of sculpture, important in itself, intensifies the expressiveness of the architectural elements in the places where it is located; for example, the sculptures in niches in the main vestibule.
The most developed programme of decoration is in the Paranimf of the University of Barcelona – the most important part of the building – where Arab-style ornamentation is applied. In Rogent's opinion, the decorative system is the most important feature of Arab architecture.