Piercefield House is a largely ruined neo-classical country house near St Arvans, Monmouthshire, Wales, about 1.5 miles (2.4 km) north of the centre of Chepstow. 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.