Marble Hill is the last complete survivor of the elegant villas and gardens which bordered the Thames between Richmond and Hampton Court in the 18th century. It was begun in 1724 for the remarkable Henrietta Howard, mistress of King George II when he was Prince of Wales, and friend of some of the cleverest men in England. The house and gardens were planned by a coterie of fashionable connoisseurs, including Mrs Howard’s neighbour, the poet Alexander Pope. Leashed dogs are allowed in restricted areas only.