Castle of el Papiol Monument · el Papiol, Baix Llobregat, Barcelona The castle of El Papiol stands on the bank of the Llobregat river and originally served to protect the course of the river and the road to Barcelona from incursions coming from Al-Andalus, within the system of fortifications built around the comital city. It is documented since 1115, when the counts of Barcelona Ramón Berenguer III and Dulce of Provence granted it to the Pere brothers, who took the surname Despapiol because of it. The barony later passed through several families, including the Guimerà and the Marimón, and in the 18th century was acquired by Gerardo Cebrià Font. Its current owners, descendants of the barony, undertook a restoration advised by Martí de Riquer, and every summer the castle hosts a music festival and other cultural activities. Photo: Antoni Grifol (CC BY-SA 3.0) What to see and do in el Papiol