The Rock of Cashel, also known as Cashel of the Kings and St. Patrick's Rock, is a historical site located at Cashel, County Tipperary, Ireland. According to local legends, the Rock of Cashel originated in the Devil's Bit, a mountain 20 miles north of Cashel when St. Patrick banished Satan from a cave, resulting in the Rock's landing in Cashel. Cashel is reputed t…The Rock of Cashel, also known as Cashel of the Kings and St. Patrick's Rock, is a historical site located at Cashel, County Tipperary, Ireland. According to local legends, the Rock of Cashel originated in the Devil's Bit, a mountain 20 miles north of Cashel when St. Patrick banished Satan from a cave, resulting in the Rock's landing in Cashel. Cashel is reputed to be the site of the conversion of the King of Munster by Saint Patrick in the 5th century.