Castell d'Aristot is located in Aristot village, Pont de Bar municipality, Alt Urgell, Lleida. The village sits atop a hill in the Segre River valley with a restored Romanesque church of Sant Andreu at its centre. Historically, this castle was one of three strategic fortifications—alongside Castell de Bar and Toloriu—that guarded the entrance to the Cerdanya region during the medieval period. The site represents an important part of Catalonia's defensive medieval infrastructure, with architecture reflecting its role in territorial control and regional administration.