Castle of Cornellà Monument · Cornellà de Llobregat, Baix Llobregat, Barcelona The castle of Cornellà, documented since 1204, is one of the emblematic buildings of Cornellà de Llobregat, today converted into a municipal and cultural facility. It stands in the Centro neighbourhood, atop a small hill overlooking the final stretch of the Llobregat river, in an area continuously settled from Roman times through the Middle Ages. The surviving structure dates from the late 13th or early 14th century, possibly linked to the Cornellà family, also called Castellvell; it has a square plan with a tower at each corner, built of natural stone and rammed earth. Since 2000, following its reconstruction, it houses the Municipal Historical Archive, and its courtyard hosts concerts and other public events. Photo: Antoni Grifol (CC BY-SA 3.0) What to see and do in Cornellà de Llobregat