Rising nearly 120m (400 ft.) above the port is one of the oldest and best-known castles in England. Its keep was built at the command of Becket's fair-weather friend, Henry II, in the 12th century. The ancient castle was called back to active duty as late as World War II. The Pharos on the grounds is a lighthouse built by the Romans in the first half of the 1st century. The Romans first landed at nearby Deal in 54 B.C., but after 6 months they departed and didn't return until nearly 100 years later, in A.D. 43, when they stayed and occupied the country for 400 years. The castle houses several exhibitions including a military museum and a film center. Audio tours of the castle are included in admission price.