Catacomb
A catacomb is an underground tunnel that is used to hold and bury dead bodies. Many of them were made in the Roman Empire.
In popular culture
Music
The Catacombs is the eighth movement from Pictures at an Exhibition by Modest Mussorgsky. It describes of loud and soft sounds of echoes in catacombs.
Catacomb Media
Grave niches in the Catacombs of Domitilla, Rome
Jesus and his twelve apostles, fresco with the Chi-Rho symbol ☧, Catacombs of Domitilla, Rome
The Chi-Rho symbol ☧ with Alpha and Omega, Catacombs of Domitilla, Rome