Major maintenance works on the building were carried out in early November 2021 to ensure its water tightness. The inside of the lead pipes was lined with a synthetic material. It allows making the gutters incorporated into the masonry durable. This way, the walls and the interior decoration will also be protected from water infiltration.
Locations of the gutters embedded in the walls 
Access scaffolding for carrying out the works 
Resin-lined gutters