Royal Chapel of Santa Ágata

Located between the Plaza del Rey and Ramon Berenguer III, on the ancient Roman wall, rises the Chapel of St. Agatha. The building has a single nave with wooden roof gable that rests on pointed diaphragm arches and exterior buttresses.

The arches start from the top of the side walls, which ensures that houses the staircases that lead to high choir and the Royal Palace rooms, which comprised. The apse of polygonal plant is covered with vault ribs. Behind the apse included in a tower of the Roman wall, there is a sacristy, covered with a barrel vault upon which rests the bell tower, octagonal.

In the previous section to the presbytery, Pedro of Aragon between 1338 and 1355 he opened a chapel that is a projection of the front walls, supported by two locks wall that reach the ground. The chapel, called the Queens contains the shields Mary of Navarre and Eleanor of Sicily, wife of King Pedro. At the foot of the ship is another small chapel projecting on corbels, built during the reign of Martin and served baptistery. Martin the Humane he also opened the door to the outside in the Plaza del Rey.

The chapel was presided by an altarpiece, now lost, by Ferrer Bassa (1344). The present altarpiece, said the Constable, was done by Jaume Huguet (1465) commissioned by the Constable of Portugal, elected king of the Catalans during the war against Joan II, and is one of the most important pieces of Catalan Gothic painting. Also commissioned by the constable, Alfonso Cordoba painted paneled ceiling, where it appears the motto of the King "peine pour joie."