Hypogea of San Pietro in Vincoli at Sant' Angelo in grotte
Since many years the research unit of the Sapienza University of Rome has dealt with the cataloging and surveying of several examples of rupestrian architectures in Italy and Cappadocia. In 2017 hypogea of the nineteenth-century church of San Pietro in Vincoli in the village of Sant'Angelo in Grotte (Italy) have been surveyed. For the first time in 1954, during pavement removal work were discovered hidden and forgotten cavities. A small chapel with a rectangular plan covered by a barrel vault was found.