Louis II, sometimes called the Younger, was the king of Italy and emperor of the Carolingian Empire from 844, co-ruling with his father Lothair I until 855, after which he ruled alone.
Louis II, from the "Emperor Windows" of Strasbourg Cathedral
Louis's gravestone in Milan
Lothair I was a 9th-century Emperor of the Carolingian Empire and King of Italy and Middle Francia.
Louis II of Italy
…825 – 12 August 875), sometimes called the Younger, was the king of Italy and emperor of the Carolingian Empire from 844, co-ruling with his father Lothair I until 855, after which he ruled alone. Louis's usual title was imperator augustus ("august emperor"), but he used imperator Romanorum ("emperor of the…
Lothair I in the Gospels of Lothair, c. 849–851, now located in the Bibliothèque nationale de France
Denier of Lothair I, struck in Dorestad (Middle Francia) after 850
Medallion presumed to be of Lothair, from the binding of the Lothair Psalter in the British Library
13th-century stained glass depiction of Lothair, Strasbourg Cathedral