Overview
Lothair I or Lothar I (Dutch and Medieval Latin: Lotharius; German: Lothar; French: Lothaire; Italian: Lotario; 795 – 29 September 855) was emperor (817–855, co-ruling with his father until 840), and the governor of Bavaria (815–817), King of Italy (818–855) and Middle Francia (843–855).
Lothair I was the eldest son of the Carolingian emperor Louis I and his wife Ermengarde of Hesbaye, daughter of Ingerman the duke of Hesbaye. On several occasions, Lothair led his full-brothers Pepin I of Aquitaine and Louis the German in revolt against their father to protest against attempts to make their half-brother Charles the Bald a co-heir to the Frankish domains. Upon the father's death, Charles and Louis joined forces against Lothair in a three-year civil war (840–843). The struggles between the brothers led directly to the breakup of the Frankish Empire assembled by their grandfather Charlemagne, and laid the foundation for the development of modern France and Germany.
Early life and reign
Lothair was born in 795, to Louis the Pious and Ermengarde of Hesbaye. His father was the son of the reigning Emperor, Charlemagne. Little is known of Lothair's early life, which was probably passed at the court of his grandfather Charlemagne. In 814, the elderly emperor died, and left his sole surviving legitimate son Louis the Pious as successor to his vast empire. The next year, Lothair would be sent to govern Bavaria for his father, the new emperor. In 817, Louis the Pious drew up his Ordinatio Imperii. In this, Louis designated Lothair as his principal heir and ordered that Lothair would be the overlord of Louis' younger sons Pippin of Aquitaine (who was 20) and Louis the German (who was 13), as well as his nephew (Lothair's cousin) Bernard of Italy. Lothair would also inherit their lands if they were to die childless. Lothair, aged 22, was then crowned joint emperor by his father at Aachen. At the same time, Aquitaine and Bavaria were granted to his brothers Pippin and Louis, respectively, as subsidiary kingdoms. Following the death of Bernard, brought on by his plotting against and blinding by Louis the Pious, Lothair also received the Kingdom of Italy. In 821, Lothair married Ermengarde (d. 851), daughter of Hugh the Count of Tours.
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