Circuit of discovery of three organs of Paris from 15h15 to 18h. 1st stage: organ of the church of Saint-François Xavier, 12 place du président Mithouard (7th) from 14h15 to 15h 2nd stage: organ of the chapel St-Ignace, 33 rue de Sèvres (6th) from 15h30 to 16h15 3rd stage: organ of the church Sainte-Clotilde, 23 B rue Las Cases (7th) from 17h to 17h45 In each church, oral presentation of the place and the instrument, followed by a hearing of the organ of about 25 minutes, mini-concert, by the holder. The public moves from one place to another at its convenience (on foot, metro, etc...)