- Historical significance: Named after the 3rd-century martyr Saint Agnes, these catacombs are a vital testament to early Christian burial practices.
- Time period: Originating in the late 2nd to early 3rd century AD, expanded during Pope Liberius’s reign (352-366 AD).
- Art & architecture: Features include frescoes, inscriptions, and Saint Agnes's tomb, with chambers carved into volcanic rock.
- Current use: Open for guided tours, showcasing its historical and religious importance.
- Accessibility: Not wheelchair accessible; narrow passages and steep stairs.
- Key features: Highlights include Saint Agnes's tomb, biblical frescoes, and relics within an adjoining ancient basilica.