Proclaimed Holy Roman Emperor by Pope Leo III and thus establishing in earnest the French Government's longtime historical association with the Catholic Church, Charlemagne tried to revive the Western Roman Empire and its cultural grandeur. Charlemagne's son, Louis I (Emperor 814–840), kept the empire united; however, this Carolingian Empire would not survive his death. In 843, under the Treaty of Verdun, the empire was divided between Louis' three sons, with East Francia going to Louis the German, Middle Francia to Lothair I, and West Francia to Charles the Bald. West Francia approximated the area occupied by, and was the precursor to, modern France.