Answer:
The First Christians who arrived to Ireland was from British and France.
Step-by-step explanation:
Before Christianity arrived people practiced pagan religion. Pagan people built monuments allover Ireland and they worshiped sun a lot. Christianity was brought by Saint Patrick who was kidnapped by the sea pirates and he reached the shore of Ireland and thereby succeeded in spreading the faith of Christianity. After which Christianity flourished and many monasteries were built.
By the twelfth century English men involved in Irish invasions. New laws were introduced which oppressed the Irish Catholics. The English crown decided to shut down the sacred monasteries and places of worship were demolished by the British.
In late sixteenth century Oliver Plunkett was appointed to be the cardinal and he was ordered to accept Holy Communion in the Anglicized tradition, he refused and Oliver Plunkett was executed in London for disobeying the crown.