Paris Catacombs explore

The Catacombs of Paris are a vast underground ossuary holding the remains of over six million people in a 1.5-kilometer network of former limestone quarries. Established in 1785 to solve overflowing urban cemeteries (like the Holy Innocents' Cemetery) that posed public health risks. Millions of skeletal remains were moved in nightly underground processions from 1786 through the early 19th century