Saint Patrick is traditionally said to have begun his mission in Ireland in the year 432 AD.

Quick Scoop: When did St Patrick come to Ireland?

Most historical and church sources place Patrick’s arrival (as a missionary and later bishop) around 432 AD, based on early Irish annals and later medieval tradition. One Vatican biography even gives a more precise traditional date, saying he arrived at Slane, in County Meath, on 25 March 432, after being consecrated bishop for Ireland.

Why 432 AD?

  • Early Irish annals, compiled a couple of centuries later, record Patrick’s arrival in Ireland in 432.
  • This date also neatly follows the mission of another bishop, Palladius, who was sent in 431 and is thought to have left soon after, clearing the way for Patrick’s better‑known mission.

A tiny bit of nuance

Historians stress that Patrick’s exact dates are not certain, but there is broad agreement that he was active in Ireland in the 5th century and that 432 became the ā€œstandardā€ traditional year for his arrival. So, while 432 AD is not provable to the exact day, it is the long‑standing traditional answer used in churches, popular history, and modern articles alike.

TL;DR: Saint Patrick traditionally is said to have come to Ireland as a missionary and bishop in 432 AD, with some sources specifying 25 March 432.

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