The four provinces of Ireland.
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During late Celtic and early historic times Ireland was divided into provinces to replace the earlier system of the tuathas.
The four provinces are;Meath, was absorbed into Leinster. During Ireland's golden age these counties were little more than loosely federated kingdoms with somewhat flexible boundaries, but in modern times they have become associated with groups of specific counties.
The provinces would be supplanted by the present system of counties after the English occupation in the twelfth century. The Irish word for province, "cúigiú", means "fifth", reflecting the original division.
See also: Irish county