The Church of San Pellegrino in Vaticano (English: Saint Peregrine in the Vatican) 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. The church now serves as the chapel of the Pontifical Gendarmerie and the firefighters of the Vatican City and is entrusted to the care of the chaplain of the corps —currently Msgr. Giulio Viviani.