The valley of Angrogna, Val di Angrogna, situated in the Cottian Alps between Piedmont and France has historic significance for the Waldensian Church. A narrow Alpine valley starting in Val Pellice, the valley of Angrogna ends at the village of Pra del Torno which was the location of a Waldensian mission centre during The Middle Ages. Due to its narrowness, the valley was a military and religious refuge for the Waldensians and Pra del Torno were the centre of Waldensian resistance from the 13th to the 18th centuries. As evidence of their persecutions, there is still a sort of catacomb located near the village of San Lorenzo.