St Briavels Castle. Antique print of St Briavels Castle, or St Briavell’s Castle, a moated Norman castle at St Briavels in the county of Gloucestershire. The castle is noted for its huge Edwardian gatehouse that guards the entrance. Antique copper-plate engraving dated in the plate 27 Nov 1783. Size of engraved area approx 5x6ins. .