https://lovetovisitireland.com/why-was-nenagh-castle-built/?fb Why was Nenagh Castle built? Nenagh Castle was built as a fortress and to lay the foundation of the town of Nenagh in the 13th century, The castle was built by Theobald FitzWalter, whose successors would become Earls and Dukes of Ormond and upon its completion c. 1220 it served as the main seat of the Butler family. The keep of the castle formed part of the perimeter of the fortress being part of the curtain walls surrounding a five-