Cly castle Aosta Valley, Italy Cly castle ruins Cly castle Show map of Aosta Valley Cly castle Show map of Northern Italy Cly castle Show map of Italy Coordinates 45°44′57″N 7°33′37″E﻿ / ﻿45.749302°N 7.560353°E﻿ / 45.749302; 7.560353Coordinates: 45°44′57″N 7°33′37″E﻿ / ﻿45.749302°N 7.560353°E﻿ / 45.749302; 7.560353 Height 2520 ft. Site information Controlled by Municipality of Saint-Denis Site history Built 1207 Built by Challant family