Sainte-Orse (French pronunciation: [sɛ̃.t‿ɔʁs]; Occitan: Senta Orsa) is a commune in the Dordogne department in Nouvelle-Aquitaine in southwestern France. The church of Saint Ursus (Saint Ours) dates from the 11th-12th century. The castle dates from the 15th-16th century.
