Kilkenny Castle - 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. William the Earl Marshall built the first stone castle on the site, which was completed in 1213. This was a square-shaped castle with towers at each corner; three of these original four towers survive to this day. Today, Kilkenny is an ancient monument and houses the National Furniture Collection of Ireland.