Former aristocratic residence of the 17th century based in Annecy, in Haute-Savoie, the castle of Trésum takes place on the hillside, on the heights of the very touristic lake of Annecy. Originally an episcopal residence, the building now houses the bishopric of Annecy.
The Château de Trésum takes the form of a building flanked by a watchtower at each corner. The current site dates mainly from the beginning of the 20th century but still presents an eastern part of the 17th century.