Nenagh Castle is a historic structure located in the town of Nenagh, County Tipperary, Ireland. Built in the 13th century, it was constructed by the Normans as a defensive fortification. The castle features a large round tower and thick stone walls, showcasing the architectural style of the period. Over the centuries, Nenagh Castle has served various purposes, including a military stronghold and a residence. Today, it stands as a prominent landmark and a popular tourist attraction, offering visitors a glimpse into Ireland's medieval history and the legacy of the Norman influence in the region.