Official site providing information for visitors and a brief history of the castle. The seat of The Dukes of Norfolk and set in 40 acres of sweeping grounds and gardens, Arundel Castle has been open to visitors seasonally for nearly 200 years. It is one of the great treasure houses of England, each having its own unique place in history and is home to priceless works of art. Come and see paintings and furniture, tapestries and stained glass, china and clocks, sculpture and carving, heraldry and armour in stunning room settings.