On Christmas 800 the III pope of this name "lionized" Charlemagne by crowning him emperor of the Romans
The coronation of Charlemagne as emperor on Christmas Day 
800 is... [DOC] [TLE] Forward - Book Reviews - Silash Ruparell [PAR] Jul 11, 2015 ... Whilst the Pope, and hence the religious centre, of the Roman Empire continued 
to be .... His cousin Constantius II preceded him as Emperor.