Kilkenny Castle was founded in Medieval times, but its most significant moments have been played out during more recent history. The castle was featured in Oliver Cromwell's re-conquest of Ireland in 1650; and was besieged during the Irish Civil War in 1922.The gravestone of Daniel O’Connell in Glasnevin Cemetery, Dublin is made from Kilkenny black marble, and the stone was also used in the construction of Cobh Cathedral in Cork
Gulliver's Travels author, Jonathan Swift, attended Kilkenny College in the late 17th century, and a building at the college was named after him in 2007. Swift's fellow students included playwright William Congreve and the philosopher George Berkeley – after whom California’s Berkeley College is named.
The "Kilkenny Cats" nickname stems from the feral felines that once inhabited the Dunmore caves in the north of the county.
Irish legend describes Dunmore Cave, seven miles north of Kilkenny, as one of Ireland’s darkest places and the site where the monster Luchtigen 'The Lord of the Mice' was killed.
Kilkenny have only met neighbours Carlow once in the hurling championship. That was in 1993 when Kilkenny won 5-19 to 16 points. Kilkenny have met Lancashire more times – twice(1905, 1913) .