Hugh the Great's power came from the extraordinary title of Dux Francorum (Duke of the Franks)[REF] that Louis IV repeatedly confirmed in 936, 943 and 954; and his rule over the Marches of Neustria, where he reigned as princeps (territorial prince).
Hugh also denied the rights to the principality of Burgundy that Hugh the Black thought he had acquired after the death of his brother King Rudolph [REF].