The Rock of Cashel (Irish: Carraig Phadraig), also known as Cashel of the Kings and St. Patrick's Rock , is a historic site in Ireland's province of Munster, located at Cashel, County Tipperary.The Rock of Cashel served as the traditional seat of the Kings of Munster for several hundred years prior to the Norman invasion, though few remnants if any of the early structures survive. The majority of buildings on the current site date from the 12th and 13th centuries.