At the headquarters of the Historical Society of Argenteuil Door open from 2 pm to 6 pm, discovery of an associative archives center and its historical library// Destocking of old bulletins at very low prices. Sunday only: Free guided walk, "Tour of the walls of the old town". Departure from 12 rue Grégoire Collas at 15h - Arrival around 16h30 in the Gardens of the abbey.