 It was built in 1834–1840 by architect Thomas Hopper for Sir Edmund Antrobus and replaced a house built in 1661 by John Webb for the 2nd Duke of Somerset.Diana's House and Kent House, gatehouses to the Abbey from the early 17th century, are both Grade II* listed.West Amesbury House is from the 15th century and is Grade I listed; it was remodelled in the early 20th century by Detmar Blow.