The grand staircase of the French comedy.

This room was called the Grand Rex because of his height and the sloping floor in tiers remembers a famous parisian movie theater. In winter, there are many bats in this quarry, thank you not to disturb them!

The workers have mounted a wall and scaffolding have large green tarpaulin over which water flows continuously. Thus, a lot of construction dust are recovered. Note that right side is a maternity ward.

The great dome of the Opera Garnier, home to several dance halls, each with its own piano. The most prestigious occupies the entire area under the green dome. The floor of the ballroom is inclined to replicate that of the theater. A sloping floor allows the public to see the choreography. For some shows, you need a flat surface. It then adds a platform.

Source: words collected from a former manager of the opera.

We find the green color throughout most of the underground quarry of Gouvieux. Probably an anti-fungal copper base.

Quarries of Saint-Cloud, in the Trocadero Park

The underground quarries of Saint-Cloud (of coarse limestone) are used as building stone. The grand facade of the Colonnade of the Louvre is partly made with this stone. The rest comes from the underground quarry of Saint-Leu Esserent. It also used the stone to build the castle of Saint-Cloud, located a few tens of meters from the quarry.

The walls of building quarry were partially dismantled to get new stones. They were used to renovate the castle of Saint-Cloud in the 19th century. However, the consequences of a large fire, the foundations were razed. The stones stolen are become useless.