Far less grand than it is today, the original castle consisted only of basic walls and two towers.

Over subsequent centuries, the castle had a number of owners including members of the House of Savoy.

A family of local nobility (House of Roncas, or Maison de Roncas in French) purchased the castle in the 17th century and it was that family that expanded the castle into a large fortified residence.

It remained in the possession of his family until the 20th century when it was handed over to the town of Saint-Pierre and became the Regional Museum of Natural Science (Italian: Museo Regionale di Scienze Naturali, French: Musée régional des sciences naturelles).

At the foot of the castle, standing out in stucco white, is the parish church of Saint-Pierre, built in 1872.