Châtillon-sur-Seine (French pronunciation: [ʃatijɔ̃ syʁ sɛn], also [ʃɑtijɔ̃]) is a commune of the Côte-d'Or department, eastern France.The Musée du Pays Châtillonnais is housed in old abbey of Notre-Dame de Châtillon, within the town, known for its collection of pre-Roman and Roman relics (especially the famous Vix Grave).