San Antonio el Real is a XV century Gothic-Mudejar style monastery that has undergone important Baroque reformation work. The complex structure of the current building is the result of the many alterations and modifications it has undergone down through its history.
The remains of the royal residence have been incorporated into the cloister of the Clarisses nuns and stand to one side of the square that gives entrance to the building while the church with its single nave and straight head wall stands almost directly opposite on the other side of the square.
The rectangular, two-storey main cloister lies to the south of the church. The bottom floor used to have pointed arches under alfizes, but woodwork was installed to close the openings in the XVIII century. An eave corbel gives on to the upper storey with partially-sealed lowered arches resting on a ledge decorated with Gothic traceries. The vaults in the lower cloister are covered with beautiful wooden gilt and polychrome decorated Mudejar coffering giving on to small side chapels that have the appearance of open arcosolia in the wall.