Point of view on a large swath of the underground quarry of Saint-Leu Esserent. This type of stone in the quarry is called mass of gold.

A military fort place under the train station of Saint-Lazare. There's still some germans signs on the wall, describing the use of a ventilation machine.

Bedienungsanweisung:
1_ Hebel am vordereren Rohr auf
2_ Anlage betätigen mittels Fahrrad oder mittels Motor. Hebel auf Ein
3_ Hebel auf Aus
4_ Hebel am vorderen Rohr auf

They explain how the ventilation system works, with a bike or a car.

Point of view on a large swath of the underground quarry of Saint-Leu Esserent. This type of stone in the quarry is called mass of gold.

Photography in relief. Thank you to Argonaut for the second camera.

A world war II bunker guarding the entry of the Saint-Leu quarry. The quarry was used by germans for missile construction.

Completion of quarrymen, engraved in the wall of the underground quarry of Saint-Leu Esserent.

Amaury Courtois has served his apprenticeship in quarry December 17, 1853 at the age of 20 years and five months, until February 17, 1854.

Cathedral Saint-Etienne de Bourges has been built from the year 1195. Its construction lasted almost a century.

We do not know the name of the architects of the cathedral. The Gothic cathedral is original and innovative.
It was classified a historical monument in 1862. The cathedral is also on the list of World Heritage by UNESCO in December 1992.

There are statues of saints in the niches at the bottom of the buttresses. On the left side, a niche remained empty because you can not see inside the ground. This is optimization!

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.

The sandstone is a soft rock found throughout the Lower Dauphiné, where it is often the only building stone. This underground quarry is one of the major mining sites in the Drôme.Exploitées since ancient times, these quarries supplied the materials to major projects such as the medieval cathedral of Valencia College Saint-Barnard de Romans. Still used for the construction of the Canal de la Bourne in 1877, molasses is used less and less irreversibly from that time, mainly because of competition from cement.

Old photograph of the incline of the underground quarry of Saint-Paul-Trois-Châteaux