Walter (or Vaulter) was Archbishop of Sens from 887 to 923.
He anointed Eudes as King of France in 888, Robert I in July 922, and Rudolph of France on 13 July 923, all in the church of St. Medard's Abbey, Soissons.
He doubtlessly inherited from his uncle Walter, Bishop of Orléans, a superb sacramentary composed between 855 and 873 for the Abbey of St-Amand at Puelle. This sacramentary, which he gave to the church of Sens, forms one of the most curious monuments of Carolingian art and is now in the library of .