What year was Ireland colonized?

The Vikings invaded of the 9th century and established trading towns (such as Dublin). The Anglo-Normans invaded and colonized in 1169 and re-organized governmental and religious systems, but their influence had for the most part been confined to a narrow strip on the east coast known as the Pale. Beyond the Pale Irish language, laws and customs prevailed and the Norman colonists were assimilated. The English colonized Ireland in the late 16th century, and during the 17th century planted settlers and split Irish society between an English-speaking landed gentry and the local Irish-speaking, landless or nearly landless peasantry.