Around 450 AD, Saint Patrick preached at the royal dun, Cashel, and converted Aengus, king of Munster. Brian Boru fortified Cashel in 990. The Rock of Cashel was the traditional seat of  the kings of Munster for several hundred years prior to the Norman invasion in 1169. In 1101, the King of Munster, Muirchertach Ua Briain, donated the fortress on the Rock of Cashel to the Roman Catholic Church. 

Pre-Norman Tipperary was divided between the old north and south Munster Gaelic kingdoms of Thomond and Desmond. These were dominated by, respectively, the O’Brien’s and the McCarthys. Tipperary was the front line of the numerous battles between the two, ending with the expulsion of the McCarthys from Tipperary into Cork.

During the 1798 Rebellion the whole of the county was declared to be "in a state of rebellion". The Young Irelander Rebellion of 1848 took place at Farranrory in south Tipperary. In 1867 during the Fenian Rising rebels burnt down police barracks across the…