- Historical significance: Final resting place for 4,000 Capuchin monks, created to embody the "memento mori" philosophy.
- Time period: Built in the 17th century, with burials from 1500 to 1870.
- Current use: A tourist site and reflection spot featuring artistic bone displays, alongside a museum on Capuchin life.
- Accessibility: Located under Santa Maria della Concezione, Via Vittorio Veneto, Rome. Open daily: 10am - 7pm.
- Key features: Five chambers decorated with bones and skulls in intricate designs. Crypt of Skulls, Crypt of Leg Bones, and the Mass Chapel (relics but no bones). Unique displays like chandeliers from shoulder blades, clocks from vertebrae.