National audienceMisadventures and Misfortunes of an Abbey at the Head of the Order: Saint-Ruf's Regular Canons from Avignon to Valence. Saint-Ruf Abbey was one of the first canonical foundations to implement the reform of the clergy wanted by Hildebrand/Gregory VII. It represents an extraordinary field of investigations if one wants to assess the place occupied by regular canons in the city's society and economy. The first century of Saint-Ruf in Avignon is characterised by hostile relationships between the head of the order built around an abbatiola situated in the outskirts of the city, and the city itself, particularly the episcopal chapter. The crisis, which started at the end of the 11th century, was put to an end by the transfer in t...