The spaces between them are filled with what was termed pierrotage, a mixture of rubblestone and clay. Each of the walls slopes slightly inward as it rises, and is braced by diagonal timbers. The roof trusses are of walnut and oak, and give the roof a bell-cast appearance.
These spaces are filled with a combination of rubblestone and clay, which is also known as pierrotage. As the walls increase in height, they have a slight inward tilt, secured by diagonal timbers. The roof trusses, constructed from walnut and oak, enhance the roof's curved shape.