Castell de Bell-lloc stands as a testament to medieval fortification in La Roca del Vallès, Catalonia. First documented in 1073, this castle played a significant role in the region's feudal history, originally granted to the monastery of Sant Pau del Camp in the 12th century. The fortress served as a strategic stronghold during the medieval period, but suffered destruction during the War of the Remences in 1460. Later transformed into a chapel in the 18th century, the structure endured further damage during the Peninsular War. Today, visitors can observe the remains of the circular tower foundation and medieval wall fragments, which have been declared a cultural property of national interest.