Santa Maria degli Angeli e dei Martiri
The Basilica of St. Mary of the Angels and of the Martyrs (Latin: Beatissimae Virginis et omnium Angelorum et Martyrum, Italian: Santa Maria degli Angeli e dei Martiri) is a Catholic titular minor basilica and former Carthusian conventual church in Rome constructed in the ruined frigidarium and tepidarium of the Roman Baths of Diocletian in the Piazza della Repubblica.
Source: Wikipedia — Santa Maria degli Angeli e dei Martiri (CC BY-SA 4.0)