Nowadays, Kilkenny Castle is effectively three-sided. One of the four walls - and one of the great round drum towers - has disappeared over time.
Where did it go? Well, the Eastern wall and the North-Eastern tower were blown up during the 1650 Cromwellian siege of Ireland.
One of the most instantly recognised buildings in Ireland, Kilkenny Castle has been an important site since Strongbow constructed the first castle, probably a wooden structure, in the 12th century.
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.
Iconic film producer and animation innovator Walt Disney has Kilkenny roots. His great-grandfather Arundel Elias Disney emigrated from Gowran, County Kilkenny, in the 19th century.
The population of County Kilkenny is 95,419 according to the 2011 census ... plus an undisclosed number of Kilkenny cats.
Collectively, Kilkenny people are known as 'The Cats', most specifically in the arena of hurling
Kilkenny Castle has soared past some incredible competition to take the title of the most popular paid visitor attraction managed by the Office of Public Works (OPW) in Ireland.
AKA is a voluntary run arts festival that showcases the hard work and talent of independent artists and community groups across Kilkenny county and city.