- Castles are the most familiar medieval landmark across the Irish countryside. Their often romantic appearance belies their turbulent history and their lore abounds in stories of sieges, betrayals and daring escapes.From the earliest stone castles such as Dublin Castle to the fortified manor houses such as Red Hugh O"Donnell"s Donegal Castle, each has a fascinating and individual story to tell."Castles of Ireland" brings the reader on a tour of more than sixty castles, from the biggest and most well-known to dramatic and atmospheric ruins which had a role to play in shaping Ireland"s history.