If we do not count Italy, France north of the river Loire possessed the densest network of ecclesiastical institutions in the Middle Ages. With several months of constant and often tedious work, we have finally come to the end of the region's eastern half. Ecclesiastically, it covers the provinces of Reims and Sens, including the historical regions of Flandre, Artois, Picardie, Île-de-France, Champagne, and Orléanais. Usuarium now provides researchers with the full contents of the voluminous Missals of Beauvais, Cambrai, Châlons-en-Champagne, Chartres, Laon, Meaux, Nevers, Noyon, Orléans, Paris, Reims, Senlis, Sens, Soissons, Thérouanne, Tournai, and Troyes.