Charlemagne is one of the defining ruler figures of the Middle Ages. His 1200th anniversary of death is being commemorated with a large exhibition in Aachen. On this occasion, Martina and Wilfried Hartmann have posed and answered the 101 most important questions about Charlemagne's life, family, and reign, the history of the Carolingians, Frankish society, as well as the significance of the emperor for the church, education, and science. How large was Charlemagne's Frankish Empire and how many people lived in it? Did the Franks speak French? What is a mayor of the palace? When and where was Charlemagne born? How many girlfriends did Charlemagne have? What political influence did his wives have? What music did a court chapel play? Was Duke Tassilo of Bavaria a traitor? What did the emperor in Byzantium think about Charlemagne's coronation? What kind of relations did Charlemagne maintain with the caliph in Baghdad? Why did the war against the Saxons last over 30 years? How many manuscripts from Charlemagne's time have survived?.