This tour of Brittany combines the traditional Tro Breizh that connects the cities of the seven founding saints of Brittany with the more personalized one of Saint Colomban, so two pilgrimages in one. This large Celtic loop in the heart of Brittany, alternating between coastal and inland routes, connects 45 sites that perpetuate the memory of St. Columbanus, his companion St. Gallen and other Irish monks. Thanks to St. Columbanus, the route offers the opportunity to discover Brittany in all its diversity.