With Fulrad of Saint-Denis, he brought to Zachary the famous question of Pepin, whose answer was supposed to justify the assumption of regal power by the Carolingians.
The historian Bernard Bachrach argues that the rise of the Carolingians to power is best understood using the theory of a Carolingian grand strategy.
Cousins of the German Carolingians, in: Katharine Keats-Rohan und Christian Settipani : Onomastique et parenté dans l'Occident médiéval, 2000, ISBN 1-900934-01-9.
Finally Duke Lupus II made his submission in Sig, and the Carolingians were able to establish Prankish dukes in the country.
Michael Glatthaar (3 May 1953) is a German scholar of the Middle Ages, specializing in the documents of the Carolingians and the study of Saint Boniface.