Church of Saint Peregrinus in the Vatican - Credit: Wikimedia Commons
The Church of San Pellegrino in Vaticano () is an ancient Roman Catholic oratory in the Vatican City, located on the Via dei Pellegrini. The church is dedicated to Saint Peregrine of Auxerre, a Roman priest appointed by Pope Sixtus II who had suffered martyrdom in Gaul in the third century. It is one of the oldest churches in the Vatican City. Read more on Wikipedia
Source: en.wikipedia.org