Moynes Court is a Grade II* listed building in the village of Mathern, Monmouthshire, Wales, about 3 miles (4.8 km) south west of Chepstow.

However, according to local historian E. T. Davies, a new manor of Newton-juxta-Mathern was formed out of the ecclesiastical lands, and was granted by the lord of Striguil (or Chepstow) to Sir Bogo (or Bevis) de Knovell (or Knovil), Sheriff of Shropshire and Staffordshire in 1254.

Earthworks to the southwest of the existing buildings suggest that it was roughly square in form, with a surrounding ditch and an outer bailey.

According to Bradney, it is likely that the original house at Moynes Court was built at that time, within the bailey to the north-east of the remains of the castle.

[2][9] Described by the architectural historian John Newman as "delightfully trim and regular",[5] it is of two storeys with five bays, and "presents an appearance of absolute symmetry.

"[5] It has a steep gable-ended roof of three gables, with prominent groups of chimneystacks, mullioned stone windows, and a central porch.

[9] Newman notes that similar examples of the court's symmetrical design can be found in houses in neighbouring Gloucestershire and in Somerset.

[15] Moynes Cottage,[16] the walled garden at the court[17] and two 17th-century tithe barns in the vicinity have separate Grade II listings.