The Santa Clara buildings were originally built by King Alfonso XI as his palace in 1344. His son Peter the Cruel had it embellished by Mudéjar artists, beautiful works at Santa Clara, though on a much smaller scale than they did in the Alcázar of Seville. The facade, a lovely small patio, a chapel and the baths remain of Peter the Cruel's palace. Blanche de Bourbon was held here after her abandonment by Peter for María de Padilla in 1353. The former portal, blocked off now, has a particularly fine Mudéjar doorway. In 1363 he ceded Santa Clara to two of his daughters by María de Padilla. They turned it into a convent, but it retained its role as a royal palace.
Santa Clara convent's saddest association is with Joanna I Queen of Castile and Aragon, the daughter of Isabella I of Castile and Ferdinand II of Aragon, widow of Philip I of Castile and mother of his six children including Charles V, Holy Roman Emperor - popularly known as Juana la loca (Joanna the mad) - who was confined here for almost half a century until her death in 1555.References:
The Château Comtal (Count’s Castle) is a medieval castle within the Cité of Carcassonne, the largest city in Europe with its city walls still intact. The Château Comtal has a strong claim to be called a 'Cathar Castle'. When the Catholic Crusader army arrived in 1209 they first attacked Raymond-Roger Trencavel's castrum at Bèziers and then moved on to his main stronghold at Carcassonne.
The castle with rectangular shape is separated from the city by a deep ditch and defended by two barbicans. There are six towers curtain walls.
The castle was restored in 1853 by the architect Eugène Viollet-le-Duc. It was added to the UNESCO list of World Heritage Sites in 1997.