Dosrius Castle crowns a hilltop approximately 246 meters above sea level in the Maresme comarca north of Dosrius, Catalonia, commanding strategic views across the coastal plains. First documented in 1114, the fortress is contemporary with nearby Burriac Castle and represents the wave of medieval fortification construction in 11th- and 12th-century Catalonia. Originally owned and maintained by a Priory, the castle now survives as atmospheric ruins that reflect both its military heritage and monastic associations. The site remains a focal point for cultural heritage tourism in the region, offering visitors insights into the religious and defensive infrastructure that protected the medieval Catalan coast and hinterland.