Tamathoul means symmetry in Arabic. This in situ artwork, produced for the le Musée des Beaux-Arts, Dole (France), is presented in the form of a series of arcs, each 2.6 meters high and placed in a frieze along the wall. Here, Younes Rahmoun worked with the motif of the arc in its negative form, materializing the opening with wood panels, passing from the hollow to the full, from the passage to the obstacle.