Dover Castle Dover Castle Dover Castle is a medieval castle in Dover, Kent, England. It was founded in the 11th century and has been described as the "Key to England" due to its defensive significance throughout history. It is the largest castle in England. This site may have been fortified with earthworks in the Iron Age or earlier, before the Romans invaded in AD43. This is suggested on the basis of the unusual pattern of the earthworks which does not seem to be a perfect fit for the medieval castle. Excavations have provided evidence of Iron Age occupation within the locality of
Corfe Castle National Trust claims that this indicates that the castle would have been one of the most important in England at the time. The castle is a Grade I listed building, and recognised as an internationally important structure. It is also a Scheduled Monument, a "nationally important" historic building and archaeological site which has been given protection against unauthorised change. The earthworks known as "The Rings", thought to be the remains of a 12th-century motte-and-bailey castle built during a siege of Corfe are also scheduled. In 2006, Corfe Castle was the National Trust's tenth most-visited historic house with 173,829 visitors. According