After returning from Versailles, we made our way that evening to the southern part of the city for a tour of the catacombs. We really liked the tour (even if it was a bit creepy) and had a lot of fun exploring the tunnels underneath the city.
In the late 1700s, some of the cemeteries in Paris were so full, that the weight of bones from mass graves caused nearby buildings to cave in, and the city was forced to take action. Parts of what is now Paris was built on top of limestone deposits, which were mined for building purposes, leaving behind a series of underground tunnels. They began nightly processions with black covered-wagons to carry the bones from the cemeteries to the catacombs, and it took two years to transport most of the bones.
Initially the bones were scattered randomly, but in the early 1800s they began to organise the bones into patterns and added signs and decorations from some of the cemeteries to turn the catacombs into a museum. It’s estimated that the catacombs hold the remains of more than 6 million people and cover about 3 acres of land underneath the city.
During the tour, they mentioned that a team goes in twice a year to do restoration work, and they take apart sections, check the conditions of the bones, and then re-stack them. It sounds like a huge undertaking!