newton house is a grade ii* listed country house situated just to the west of the market town of llandeilo in carmarthenshire, wales. it is partially owned and maintained by the national trust and lies within dinefwr park (sometimes anglicised as "dynevor") and the grounds of dinefwr castle. the original house was built during the medieval period on a site which has been occupied for at least two millennia. the current house was built by edward rice in the jacobean style in 1660, though extensive changes were made in the 1850s in the venetian gothic style. the house played a role in the rebecca riots of 1843, when the occupant of the house at the time, colonel george rice, received a death threat with an empty grave dug in the ground. after 1956 the property fell into turbulent times when two owners died within the space of a few years. it was sold in 1974, and later fell into disrepair; it was occupied by squatters and thieves who removed beams and furniture.