La Crête Abbey was a Cistercian monastery in the commune of Bourdons-sur-Rognon. It was founded in 1121 as the second daughter house of Morimond Abbey by Simon de Clefmont, after a failed attempt at a foundation in 1118 at the site now known as La Vieille-Crête. The abbey was very active in founding further monasteries: Les Vaux-en-Ornois in Saint-Joire (1130), Saint-Benoît-en-Woëvre (1132), Les Feuillants (1145) and Matallana in Villalba de los Alcores (1173).
It was suppressed during 1791 in the French Revolution, when the church and conventual buildings were mostly demolished. Little remains of the mediaeval structures, known from a plan of 1705, apart from the chapter house. The gate house of 1715 also survives.
References:The Château du Lude is one of the many great châteaux of the Loire Valley in France. Le Lude is the most northerly château of the Loire Valley and one of the last important historic castles in France, still inhabited by the same family for the last 260 years. The château is testimony to four centuries of French architecture, as a stronghold transformed into an elegant house during the Renaissance and the 18th century. The monument is located in the valley of Le Loir. Its gardens have evolved throughout the centuries.