Besides being author of the famous Tome and orchestrator of the Council of Chalcedon in 451, Pope Leo I is most famous for meeting with Attila the Hun and stopping him from sacking Rome. We first hear of this in Prosper of Aquitaine’s Chronicon for 455:
Now Attila, having once more collected his forces which had been scattered in Gaul [at the battle of Chalons], took his way through Pannonia into Italy. . . To the emperor and the senate and Roman people none of all the proposed plans to oppose the enemy seemed so practicable as to send legates to the most savage king and beg for peace. Our most blessed Pope Leo -trusting in the help of God, who never fails the righteous in their trials – undertook the task, accompanied by Avienus, a man of consular rank, and the prefect Trygetius. And the outcome was what his faith had foreseen; for when the king had received the embassy, he was so impressed by the presence of the high priest that he ordered his army to give up warfare and, after he had promised peace, he departed beyond the Danube. (cf. Medieval Sourcebook)
The Liber Pontificalis makes this encounter with Attila pretty much the most important thing in Leo’s pontificate. And why not?
Well, it certainly wasn’t a big deal to Leo, it seems.
Indeed, if it weren’t for the fact that Prosper published the entry for 452 in 455, I would doubt that this ever happened. I would say that Prosper had made it up to glorify his great hero Leo (second only to Augustine for this Augustinian) or that Prosper, way over in Gaul, had been misinformed.
I would say such because the evidence is a bit weak. Leo wrote eight letters in 452 that have come down to us, on 27 January, 22 May, 11 June, and 25 November. He preached an Epiphany sermon (Serm. 37), a Lent sermon (Serm. 45), two Holy Week sermons (Serm. 62 & 63), an Advent sermon (Serm. 19), and a Christmas sermon (Serm. 28). He seems to have been in Rome for much of the year. The trip to meet up with Attila must not have taken up a lot of time.
Leo’s episcopate lasted for nine more years after Attila left Italy. Leo wrote many more letters and preached many more sermons that have come down to us. In none of these does he mention an encounter with Attila.
If Prosper is correct about this encounter, what does that say about Leo?
Something good, I reckon.