The patron of Saint-Pierre is Saint Peter, celebrated on 29 June together with Saint Paul: the village's parish church is named after them both.
Above the hamlet of Tâche rises the castle of Saint-Pierre, one of the symbols of the Aosta Valley, which houses the regional Museum of Natural Sciences; not far away, along the road towards Villeneuve, stands the municipality's other castle, the Sarriod de la Tour.


