Bound on the east by Windmill Lane, Osterley Park is one of the largest open spaces in London, and in it sits a glorious manor house of the same name. Originally built as a country retreat for the banker Sir Thomas Gresham in the mid-1500s, it was remodelled 200 years later under the direction of celebrated architect Robert Adam. This soft, muted green, from the main stair and north passage, characterises his exquisite taste and understanding of colour.