The catacombs of Paris are believed to be the quarries of the past, where human remains were later stored. I suggest confronting the official history with trivial mathematics: according to rough estimates of experts, the remains of 6 million people lie in the dungeons (and this only in the studied section of 11 km).
In the 18th century, fewer than 500,000 people lived in Paris, in 2020 - 2 million.
11 million corpses where from? We can assume that corpses were brought here from all the neighborhoods for many centuries, but the age of all the remains is almost the same, which means they died in the same period of time.
If only we knew what happened almost three centuries ago, which destroyed millions of people all at once.
