Gregory, later called the Great (Gregorius Magnus), was born ca 540 to an influential Roman family with some connection to the ancient gens Anicia. His great-great-grandfather was Felix III, who served as the bishop of Rome from 526 to 530. Possibly, Agapetus I, pope between 535 and 536, was his relative as well. Little is known about his early career, but in 573 Gregory ascended to the high office of the city prefect. Shortly afterwards, however, he resigned from his post and adopted the monastic way of life. He founded a monastery dedicated to St. Andrew within his family estate on Coelian Hill, next to the library established by Agapetus and Cassiodorus. Six other monasteries were founded in the estates his family owned in Sicily. Soon after his monastic conversion, he started to be given various tasks by Popes Benedict I (575–578) and Pelagius II (578–590). At that time, he was ordained a deacon. Between 579 and 585/6, Gregory acted as Pelagius` envoy in Constantinople. In 590, he was elected Pelagius` successor to the bishopric of Rome. The registry of his letters contained copies of Gregory`s papal correspondence up to his death in 604. The scope of Gregory`s original registry is still the subject of scholarly speculation. There are 854 extant letters gathered in fourteen volumes, most of them (686 letters) originating from the collection compiled at the time of Pope Hadrian I (772–795).

 

It is worth remembering that the majority of Gregory’s correspondence was jointly produced by the pope and his subordinates, see Pollard 2013.