

Lotharingia resulted from the tripartite division in 855 of the kingdom of Middle Francia, which itself was formed after the threefold division of the Carolingian Empire by the Treaty of Verdun of 843. It was named after King Lothair II, who received this territory after his father Lothair I's kingdom of Middle Francia was divided among his three sons in 855. As a more durable later duchy of the Ottonian Empire, it comprised present-day Lorraine (France), Luxembourg, Saarland (Germany), the eastern half of Belgium and the southern half of Netherlands, along with parts of today's North Rhine-Westphalia (Germany), Rhineland-Palatinate (Germany) and Nord (France). Lotharingia (Latin: regnum Lotharii, regnum Lothariense, Lotharingia, French: Lotharingie, German: Reich des Lothar, Lotharingien, Mittelreich) was a short-lived medieval successor kingdom of the Carolingian Empire.
