The Cardiff Castle is a historic castle in Cardiff, Wales. It is one of the most popular tourist attractions in Wales and is home to the National Museum of Wales. The Cardiff Castle is a Norman castle that was built in the 11th century. It was later rebuilt in the 19th century and is now a Grade I listed building. The castle is home to a number of historic rooms, including the Norman Keep and the Banqueting Hall. It also has beautiful gardens and grounds.