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.
The Butler family handed Kilkenny Castle over to the people of Kilkenny in 1967 – for £50!
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.
Collectively, Kilkenny people are known as 'The Cats', most specifically in the arena of hurling
In 1922, the Butler family - namely Lord and Lady Ossory - were residents of the castle. The Irish Civil war, raged around them. Lord Ossory memorably wrote that he was woken at the "unreasonable hour of 5.30am" by his butler, who brought the news that Republican forces had seized and occupied his castle.
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.
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.