The Garden Museum is on the site of the old church of St Mary-at-Lambeth and the church tower is five hundred years old. The display includes photographic panels, antique tools, garden-related objects, and a replica historic garden. The building is made of Kentish ragstone, its stained-glass windows have been restored, and its ancient churchyard has been landscaped with a 17th Century knot garden with a colourful assortment of flowers, plants and trees.