Oh God, Oooo catacombs, I can join in here, years ago I worked in London in a building that was built on top of the site of the penultimate ripper murder, holy trinity priory, mitre square. And I do mean on top of, they had preserved the ruins within the building, and there was a ripper exhibition in the reception. Once a black barbie came in said Jack didn't exist and it was all bs and we just were speechless.