1366AD- Statutes of Kilkenny prohibit intermarriage between Irish and Normans. 1391AD- Book of Ballymote deciphers Ogham alphabet. No one really cares. The Pale comes into existence, driving a wedge between Dublin and the rest of the country which is still evident. The Reformation sweeps across Europe.
Monasteries come out the worse for wear.
1541AD- English Parliament declares Henry VIII King of Ireland. No-one thought to ask Irish permission. 1556AD- Laois and Offaly planted with settlers from England. The native Irish begin to plant them too, in a much more literal sense. Retaliation by the English is swift and brutal.