Pope Leo III and Charlemagne
By Tea at Trianon on June 16, 2014
"The Justification of Leo III" by Raphael From Nobility: With the letter informing Charlemagne that he had been unanimously elected pope, Leo sent him the keys of the confession of St. Peter, and the standard of the city. This he did to show that he regarded the Frankish king as the protector of the Holy See. . . .