The Abbey of Fontenay is a former Cistercian abbey located in the commune of Marmagne, near Montbard, in the département of Côte-d'Or in France. It was founded by Saint Bernard of Clairvaux in 1118, and built in the Romanesque style. It is one of the oldest and most complete Cistercian abbeys in Europe, and became a UNESCO World Heritage Site in 1981. Of the original complex comprising church, dormitory, cloister, chapter house, caldarium, refectory, dovecote and forge, all remain intact except the refectory and are well maintained.