The Waterford Viking Triangle is part of the cultural and heritage area in Waterford City. It is so called because of the 1000-year-old Viking walls which once surrounded it. Perhaps the most famous building in the triangle is Reginald's Tower (which contains the Viking Museum) but the triangle is also the site of the Medieval Museum and the Bishop's Palace Museum, collectively known as Waterford Museum of Treasures.SitesReginalds TowerThe best-known building in the Viking Triangle is Reginald's Tower, the oldest urban civic building in the country, situated on the Quays/The Mall, in Waterford. It has performed various functions over the years and today is a civic museum.Waterford CrystalThe Waterford Crystal factory and showroom are on The Mall, which is just to the south of the Triangle. Guided tours are available for the factory.Waterford TreasuresThere are three museums in the Viking Triangle - collectively known as Waterford Museum of Treasures. The Viking Museum is housed in Reginald's Tower. The Medieval Museum and Bishop's Palace Museum are close to Cathedral Square.The Medieval Museum includes two medieval chambers, the 13th century Choristers’ Hall and the 15th century Mayor’s Wine Vault. The only piece of clothing from Henry VIII, a cloth cap, is housed in the museum.The Bishop's Palace Museum is a 250-year-old Georgian structure and contains artifacts dating from 17th century Waterford to the presen.French ChurchAnother much on Bailey's New St./Greyfriars is the French Church (Greyfriars Abbey), a Friary dating from the 13th century.