The Catacombs was a public health issue. The older graveyards were full and bodies were rotting in the open. I can't remember if that also coincided with the co

The Catacombs was a public health issue. The older graveyards were full and bodies were rotting in the open. I can't remember if that also coincided with the collapse of a road into the tunnels underneath, but that was around the same time. +/- 100 years.