In 1650 invading Cromwellian forces mounted an attack on Kilkenny castle and although it was initially successfully defended they eventually managed to take control of the city by another route.
The "Kilkenny Cats" nickname stems from the feral felines that once inhabited the Dunmore caves in the north of the county.
The architect who built the White House in Washington, D.C., James Hoban, was raised on the Earl of Desart’s estate in Cuffesgrange, near Callan in Co. Kilkenny.
The elevation of Kilkenny is 60 metres (200 ft) above sea level. The area of Kilkenny borough is 3.74 square kilometres (1.44 sq mi). Kilkenny is the smallest city in Ireland and although all cities in Ireland are by the coast or along a river Kilkenny is the only city that is not tidal.
Kilkenny is 117 kilometres (73 mi) away the capital Dublin and 48 kilometres (30 mi) north from the nearest city Waterford. Wexford is 80 kilometres (50 mi) to the south-east and Limerick is 122 kilometres (76 mi) to the west.
The annals tell of a terrible massacre which took place in Dunmore Caves, with 1000 people killed by attacking Vikings in 928AD. Over the years there have been numerous finds of human bones, which together with finding of the Viking artifacts, seem to bear out that terrible tale.