Regarding the roof, the large medieval roof was destroyed and replaced by a flat Italian roof in 1844. The restoration work allowed the restoration of the original roof, higher and more sloping. The various trades were rigorously coordinated: the roofers worked while the teams of carpenters advanced throughout the 80 m of the building.
Amazing Roof Restorations metal frame, with honeycomb beams, made it possible to free up a large interior volume, while accommodating the ventilation, air conditioning, electricity, plumbing, smoke extraction networks, etc. Screwed onto it, an oak frame creates the anchor points necessary to nail the battens. The liteaunage, in oak, respects the implementation of the time but its installation is delicate: very hard and heavy, the oak twists and splits.