The term medieval overlaps with the early Christian period in Ireland.
The first Viking raid on Ireland took place in 795 AD.
The Anglo-Normans first came to Ireland to assist Diarmuid MacMurrough, king of Leinster in 1169.
An Anglo-Norman colony soon developed in parts of Ireland and encroached on Gaelic society.
There was a resurgence of Gaelic power and influence in the fourteenth century.
A plague called the 'Black Death' reached Ireland in 1348.
The Statute of Kilkenny in 1366 shows how the English colonists feared and despised the influence of the Gaelic Irish.