Lothair I [SEP] position held
Lothair I
Lothair I or Lothar I (Dutch and Medieval Latin: "Lotharius", German: "Lothar", French: "Lothaire", Italian: "Lotario") (795 – 29 September 855) was the Holy Roman 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 (840–855).
Lothair was the eldest son of the Carolingian emperor Louis the Pious and his wife Ermengarde
-in-law, to Aix-en-Provence. In 843, he married Bertha, daughter of Lothair I (May 800 - Sep 855) and Ermengarde of Tours (800-851). Hugh II (780-837) was Bertha's grandfather.
In 855, Girart became governor of Provence for Lothair's son Charles, nominal king of Provence. His wife Bertha defended Vienne unsuccessfully against Charles the Bald in 870. Girart, who had perhaps aspired to be the titular ruler of the northern part