High Quality Content by WIKIPEDIA articles! The Westgate is a medieval gatehouse in Canterbury, Kent, England. This 60-foot-high western gate of the city wall is the largest surviving city gate in England. Built of Kentish ragstone around 1379, it is the last survivor of Canterbury`s seven medieval gates, still well-preserved and one of the city`s most distinctive landmarks. The road still passes between its drum towers, and there is just enough room for a double-decker bus to pass beneath. This scheduled monument and Grade I listed building houses the hundred-year-old West Gate Towers Museum, which as of July 2011 was open every day from 10am to 4:30pm, although it is currently closed for legal reasons. Access to the museum and roof is via spiral staircases only.