The Bishop’s Palace in Waterford City was built in 1741 to the designs of the famous architect Richard Cassells (Cassells other works include Westport House, Powerscourt House, and Russborough House). This was the site of an earlier medieval palace and became the home of the Church of Ireland Bishops of Waterford and Lismore until the early 20th century. It then became a school for boys and subsequently council offices. Waterford City boasts the finest collection of Georgian architecture of any city in Ireland outside of Dublin. The building is now a museum that houses the ‘treasures of Waterford City’. Visitors can see the World’s oldest piece of Waterford Crystal – a decanter made in the 1780s.