Saint Guirec (circa 6th cent.), according to oral tradition, was a Welsh monk who sought to establish a monastery in Celtic Brittany. In the region of Traou-Perros is where Guirec chose to found his new community. Saint Guirec is commemorated locally by the Roman Catholic Church in Brittany in conjunction with a traditional Breton Pardon ceremony on the eve of the Feast of the Ascension of Christ into heaven. 'Ascension Day' is celebrated the fourtieth day after Easter.