Anscar I was the margrave of Ivrea from 888 to his death. From 877 or 879, he was the count of Oscheret in Burgundy. He supported Guy III of Spoleto for the throne of France after the deposition of Charles the Fat in 887, but after Guy's failed attempt and the coronation of Odo, he returned with Guy across the Alps, where the duke was elected King of Italy. In gratitude, Guy created the March of Ivrea in the northeast and invested his Burgundian supporter.