Dialogues (Pope Gregory I)

The Dialogues (Latin: Dialogi) of Gregory the Great, completed in 593, is a collection of four books.

The first three are of miracles, signs, wonders, and healings done by the holy, mostly men, in Italy.

Notably the second book focuses on the life of Benedict of Nursia (more commonly known as Saint Benedict), and "... is the fullest source for this subject".

"[The] fourth book of the Dialogues is primarily a treatise to prove the existence of invisible realities, mainly the soul and the afterlife."