Four-sided fortified house with beautiful windows in worked stone, its construction is believed to date back to 1560.

De Tillier, a Valdostan historian of the 18th century, says that the cathedral chapter and the chapter of Sant’ Orso, who shared the territory of Derby, each had its own fortified household. It appears that being unable to apply justice there themselves, the canons of Sant’Orso engaged Giacomino d’Avise to do it in 1352.