Mesnil-Roc'h

Mesnil-Roc'h (Sant-Pêr-Plewenn) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France. It was established on 1 January 2019 by merger of the former communes of Saint-Pierre-de-Plesguen (the seat), Lanhélin and Tressé.