Cardiff is the capital and the largest city of Wales located on the river Taff. The castle in Cardiff was built in the 1st century of our era. It was erected by the Romans, for whom the location of the castle was important. Because of the sea access the castle in Cardiff was an important strategic point. The castle and its vicinity are often visited by the tourists not only for its architectonic and historic qualities, but also for rock concerts organized at the castle, which have been popular recently.