Treaty of Prüm, 855 — The Kingdom of Lotharingia (Lothair II, purple) For Charles, a new kingdom was formed by the union of Provence proper with the duchy of Lyons (i.e. the Lyonnais and the Viennois)
Photo Credit: By Trasamundo - Own workAquitania - https://commons.wikimedia.org/w/index.php?curid=9729855