Map of Underground Cavities of Rome 2026

The Map of Underground Cavities of Rome 2026 represents a significant update to the current knowledge framework regarding the distribution of underground voids within the urban territory of Rome. The cartography was produced by integrating data from scientific literature, historical cartographic archives, institutional databases, archaeological maps, and direct investigations, enabling the mapping of the main types of underground cavities (quarries, catacombs, hypogea, hydraulic tunnels, and other underground infrastructures) as well as the development of a density map of hypogeal systems.