When being restored in the 19th and 20th centuries, the Gothic window of the façade was rebuilt, as it had previously been substituted by a simple rectangular opening.

The Campo Santo (or Saint-Jean cloister), on the south side of the cathedral, was the urban cemetery of Perpignan.

Its construction probably began as early as 1298, in any case before 1302 (the date on the tombstone of the hebdomadary Guillem Jorda, "initiator of the work of the cloister"), and continued in the first half of the 14th century.

Numerous elements of sculptures (burial stones, low reliefs) can be seen in the niche tombs.

The simple skylight galleries (wooden poles carrying the cover, with pillars at the corners), which surrounded the cloister disappeared at the beginning of the 19th century; during the restoration some elements from them were found and moved to the Convent of the Minimes in Perpignan for storage.