Montemirabile Chapel
Italy
The Montemirabile or Saint John the Baptist Chapel, otherwise the Baptistery (Italian: Cappella Montemirabile, Cappella di San Giovanni Battista, Cappella del battistero) is the first side chapel in the left aisle in the Basilica of Santa Maria del Popolo.
Data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).