Reginald's Tower is a historic structure located in Waterford, Ireland. It dates back to the 12th century and is part of the city's medieval fortifications. The tower stands at approximately 15 meters tall and features a circular design, showcasing the architectural style of its time. The tower is named after Reginald, a Viking leader who is believed to have established a settlement in the area. Today, Reginald's Tower serves as a museum, displaying artifacts and exhibits related to the Viking history of Waterford and its significance in Ireland's past.