In honor of St. Patrick’s Day, here’s my reconstructed timeline for the historical Patrick. In my second historic fantasy novel, Patrick’s superiors are so exhausted by his constant nagging about preaching to the Scots Irish that they ship him off to Britannia to practice on civilized Christians who’ve backslid into Pelagianism… or on Britons still following the Old Ways.
Constraints
What do we actually know about Patrick?
And yes, there were two Patricks:
This distinction matters, because it allows me to create a sensible timeline where Patrick does not celebrate an eleventy-first birthday and die aged 120.
Reconstruction
I’m starting with the “Two Patricks” theory proposed by T. F. O’Rahilly in 1942. It’s the only theory that really makes sense.
Palladius arrived in Ireland in 431/432 and died in 457 AD.
For Patrick to have interacted with Germanus, he must have reached Auxerre before Germanus’s death in 448. Working backward:
This gives us a clean, internally consistent early life.
If Patrick begins study in 447 and Palladius dies in 457, then a 461 mission date gives Patrick 14 years of rigorous theological training. That puts him at age 37 when he’s sent to Ireland, which nicely aligned with late Roman church norms (30 for priesthood, 35 for bishop).
From there, a 32‑year mission ending in 493 gives him a lifespan of 69. Respectable, plausible, and not requiring any miraculous longevity.
Timeline
To build this timeline, I drew on primary sources including Prosper of Aquitaine’s Chronicon, Patrick’s Confessio, the Annals of Ulster, and the Annales Cambriae.
Novel Application
This reconstruction lets me place Patrick in Britannia in 450 AD, wandering the roads and accidentally alarming powerful people. In Chapter 5, High Bishop Vortigern of Londinium is not amused:
“My sources say a Gallic priest has been preaching along the road from Portus Ritupis.” Vortigern took a healthy gulp of wine. “Some sort of perverse pilgrimage. Stirring my people with talk of Augustine and divine grace and similar rubbish.”