- Mac Murchada leads his Anglo-Norman allies to Ireland, they conquer vast parts of the island and the adventurer "Strongbow" establishes himself as King of Leinster. Henry II of England accepts the submission of most Irish kings and bishops, thus starting the English rule.
- Rory O'Connor holds the title of "High King of Ireland" and is allowed to rule the unoccupied parts as a vassal of Henry II.
- Prince John, younger brother of Richard the Lionhearted, is made Lord of Ireland.
- "Classical Irish Period" in literature.
- King John confiscates all Ulster and other lands during his (second) visit, also accepts the submission of numerous Irish kings.
- Meeting of the first Irish parliament in Dublin.
- Edward Bruce invades Ireland from Scotland and is proclaimed King of Ireland by his local allies, his adventure ends in disaster and his own death at the battle of Fochard.
- The "Black Death" kills around one third of the total population of Ireland.
- Sensing that the established Anglo-Normans are becoming "more Irish than the Irish themselves", the Statutes of Kilkenny ban the use of the Irish language by settlers and interracial marriages.


