Montquintin Castle is an ancient feudal castle, now in ruins, situated on a ridge overlooking the valley of the Ton, to Montquintin (municipality of Rouvroy) in Gaume in the extreme south of the province of Luxembourg, Wallonia, Belgium.

In the Middle Age, Montquintin was part of Chiny County and its fortified castle was the stronghold of Latour.

Hontheim distinguished himself from 1763, under the pseudonym Justinus Febronius by his revolutionary theories called "Febronianism", on the authority of the Roman Curia and Pope Clement V. The deed of sale dated 20 November 1753, between the lord of Reumont and Count de Baillet, described as the castle had to find the Bishop of Hontheim seven years later: "That stately home applied to several homes, lower courtyard, high court, dovecote, all enclosed by ditches and high walls, with towers and turrets, drawbridge, surrounded by deep ditches heretofore to whitewater populated fish."

Over the centuries the castle has undergone many changes: The left wing: outbuildings where were the kitchens: bread oven is still there today.

The right wing: the round cylindrical (steep side) is characteristic of the Middle Ages .