Saint Charlemagne
The 'Belles Heures' of Jean, duc du Berry, painted by the Limburg brothers (end of 14th century) has this portrait of Charlemagne as crowned royal saint. Charlemagne was venerated as a saint—particularly within the royal family—in France as well as the Holy Roman Empire. New York: Cloisters: Belles Heures, f. 174v.