Main Page | See live article | Alphabetical index Leo III was Pope from 795-816. On Christmas Day 800 Leo III crowned Charlemagne emperor. The reasons for this action, the involvement beforehand of the Frankish court, and the relationship to the Byzantine Empire are all matters of debate among historians. Preceded by: Pope Adrian I List of popes Succeeded by: Pope Stephen V This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.