Take note of Our Lady's rose window. 78 of the window's 105 pieces of glass are original, dating back to the 13th century. The church's pipe organ is much newer, having been installed in 2003. With 7000 pipes, it is the largest organ in Switzerland. Take also note of a masterpiece of architectonic decoration, the "Painted Portal" (Portail Peint) which is marked by its originality of design, iconography and polychromy.