Kilkenny Castle, Ireland. Built in the twelfth century, Kilkenny Castle was the principal seat of the Butlers, earls, marquesses and dukes of Ormond for almost 600 years. Under the powerful Butler family, Kilkenny grew into a thriving and vibrant city. Its lively atmosphere can still be felt today. The central block includes a library, drawing room, nursery and bedrooms decorated in 1830s splendour. The magnificent Picture Gallery is situated in the east wing of Kilkenny Castle.This stunning spa