A piece of amateur map founded in the quarry. I don't know the author of this one. Please contact me if you recognized yourself...

source: unknown

The underground lake in the salt mine is over 100 meters long and 40 meters wide. Across the bridge by boat. The scope of the vault is impressive!

The Cathedral of the salt mine has more than 3000 sq. ft with 17 feet ceiling! More than 100 meters underground.

This room is located under the last dome. Its blue is very pretty.

The south tower of the church of Saint-Sulpice, 68m high, was never completed. It's just if a staircase leads to the top of it.

Quarry of Bougival

A plaque engraved stone, lost in the informal network of underground quarries of Paris.

Ossa arida
Audite verbum Domini
Intromitam in vos spiritum et vivetis
Et dabo super vos nervos
Et succrescere faciam super vos carnes,
Et superextendam in vos cutem
Et dabo vobis spiritum
Et vivetis ossa arida

Listen, dry bones.
Listen to the voice of the Lord.
The mighty god of our ancestors,
Who created a breath beings,
Join your separate nodes.
You will pick the new flesh.
The skin will form on them.
Bone dry, you will live.

The Church of St. Augustine (Paris) has been built under the direction of Victor Baltard between 1860 and 1871. The land for the building is small, so they used a metal structure for the building. The advantage of this kind of construction is the absence of flying buttresses. That was the first time a great building was built with a metal structure. The land also not having a rectangular shape, wich is why the church is trapezoidal, with a narrow face and a much larger chorus. It measures about 100m long and rises to 80m high.