| Treowen | |
|---|---|
 "a very magnificent building" | |
| Type | House |
| Location | Dingestow, Monmouthshire, Wales |
| Coordinates | 51°47′46″N 2°46′56″W / 51.796°N 2.7822°W |
| Built | 1615-1627 |
| Built for | William Jones |
| Architectural style(s) | Vernacular |
| Governing body | Privately owned |
Listed Building – Grade I | |
| Official name | Tre-Owen |
| Designated | 1 May 1952 |
| Reference no. | 2065 |
| Official name | Treowen |
| Designated | 1 February 2022 |
| Reference no. | PGW(Gt)22(Mon) |
| Listing | Grade II |
  Location of Treowen in Monmouthshire | |
Treowen (or Tre-owen) is an early 17th-century house in Monmouthshire, Wales, regarded as "the most important gentry house (of its date) in the county". It is located in open countryside within the parish of Wonastow, about ½ mile (1 km) north-east of the village of Dingestow, and 3 miles (4.8 km) south-west of Monmouth. After being used as a farmhouse for three centuries, Treowen now operates as a conference and functions venue and holds the annual Wye Valley Chamber Music Festival. It is a Grade I listed building, and its gardens are designated Grade II on the Cadw/ICOMOS Register of Parks and Gardens of Special Historic Interest in Wales.