Piercefield House near St Arvans, Monmouthshire, Wales, about north of the centre of Chepstow, is a largely ruined neo-classical country house. The central block of the house was designed in the very late 18th century, by, or to the designs of, Sir John Soane. It is flanked by two pavilions, of slightly later date, by Joseph Bonomi the Elder. The house sits within Piercefield Park, a Grade I listed historic landscape, that was created in the 18th century as a notable Picturesque estate.