a village of north-eastern France, in the department of Aube, 40 m. E.S.E. of Troyes on the Eastern railway to Belfort. Clairvaux (Clara Vallis) is situated in the valley of the Aube on the eastern border of the Forest of Clairvaux. Its celebrity is due to the abbey founded in 1115 by St Bernard, which became the centre of the Cistercian order. The buildings (see Abbey) belong for the most part to the 18th century, but there is a large storehouse which dates from the 12th century. The abbey, suppressed at the Revolution, now serves as a prison,. containing on an average Boo inmates, who are employed in agricultural and industrial occupations. Clairvaux has ironworks of some importance.