Located on a rocky outcrop called Cornimont, the Trinity chapel is built from limestone rubble in the Gothic tradition. Above the entrance is the date for 1610 under a coat of arms. The chapel is made up of a nave with two bays and a blind chancel with three sides. The nave has crown windows and an arched doorway with Gothic dripstone and prismatic cones. The façade has a rectangular window giving a view of the altar. This window was formerly closed with a shutter. The building has a zinc roof over a wooden ledge. Octagonal on a square plane, one end is bulbous.
Below and alongside the access path is a mainly open booth in front of a chapel arranged in a cave. This booth, built at the beginning of the 18th century and extensively restored during the second half of the 20th century, rests on four Tuscan columns on pedestals. There is a zinc roof in the shape of a bell tower, making it very similar to the chapel of Christ situated not far from the Notre-Dame de Grâce chapel. Behind the bossaged façade of the chapel of the Monument is a tomb in red Saint-Remy marble. The site also contains the remains of a hermitage that was inhabited until the French Revolution and the location of a cross.
Site listed on 3rd February 1953
Building listed on 6th December 1976