It was Pope Gregory III (731-741) who formally instituted the feast of All Saints on 1 November when he consecrated a chapel to all the martyrs in Saint Peter’s Basilica in Rome; he then required the Feast of All Saints to be observed annually. Surprisingly, this celebration was originally confined to the Diocese of Rome. It was not until Pope Gregory IV (827-844) assumed the Throne of St Peter that the feast was extended to the entire Church on that day.