What's the Origin Story of the Paris Catacombs?

I like to think it's either storage or just like an easy getaway thp to shelter. There are whole sections that are permanently blocked off because people have gone down them and just disappeared. That's terrifying. How do we not know? So i don't know. What i want so badly is for that a splunking device that they used in promethean or prometheus were they like, send the drone into this yan of cavernous system and maps it out,. ad he goes i and just scans it. Im like, i want that so bad for the pair's catacombs.