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There are at least four monastic settlements made in caverns or caves, perhaps previously used and then transformed during the rise of Christianity. The settlements are the ‘Caves of San Lorenzo’, painted and connected to a small necropolis, the ‘Caves of San Leonardo’, in which we recognize the remains of a church dug out of tufa, the ‘Caves of San Salvatore’, with a fresco of the XIII century and the ‘Sant’Angelo Grotte’ with a central pillar.