Musée-Château d'Annecy occupies the former residence of the Counts of Geneva and Dukes of Genevois-Nemours, with the castle's oldest section, the Tour de la Reine, dating to the 13th century and showcasing architectural evolution through the 16th century. The museum houses collections spanning regional art, traditional Savoyard furniture, medieval sculpture, landscape painting, contemporary art, and animation films, complemented by the Regional Alpine Lakes Observatory featuring interactive displays on Lake Annecy's unique ecosystem and the balance between human activity and natural preservation.