The Congregation of St. Vanne or Congregation of St. Vanne and St. Hydulphe (French: Congrégation de Saint-Vanne et Saint-Hydulphe[1]), sometimes also known as the Vannists (Vannistes) was a Benedictine reform movement centred on Lorraine. It was formally established in 1604 on the initiative of Dom Didier de La Cour, prior of the Abbey of St. Vanne[2] near Verdun, a reformer of the Benedictine Order after the Council of Trent. The Abbey of St. Hydulphe at Moyenmoutier was a secondary centre of the reform.
The response to the attempts to return the Benedictine houses to a more rigorous way of life in accordance with the Rule, combined with serious study and scholarship, was very positive, but Lorraine was not at that time under the French crown. A parallel movement specifically for the French Benedictine houses, on the same principles as those of the Congregation of St. Vanne, was therefore launched from the abbey of Saint-Germain-des-Prés in 1621, and gave rise to the Congregation of St. Maur, which in the event became far better known than the Vannists.
The Congregation of St. Vanne continued however in Lorraine in parallel to that of St. Maur until the French Revolution, when both were abolished.
Distinguished Vannist scholars included Dom Antoine Calmet, Dom Rémy Ceillier, Dom Jean François, Dom Nicolas Tabouillot and Dom Ambroise Pelletier. The noted Dom Perignon, of champagne fame, was a member of this Congregation.