He studied at Reims under Gerbert, afterwards Pope Silvester II., who taught him mathematics, history, letters and eloquence.
Meanwhile, at Rome, Silvester Mazzolini of Prierio, a Dominican monk and Inquisitor, had been studying the Theses, was profoundly dissatisfied with them, and wrote a Dialogue about the Power of the Pope, against the presumptuous conclusions of Martin Luther.
He was educated at Reims under Gerbert, afterwards Pope Silvester II.
One of the most prominent personages of the century was Gerbert of Aurillac, who, after teaching at Tours and Fleury, became abbot of Bobbio, archbishop of Reims, and ultimately pope under the name of Silvester II.
Pietro in Ciel d'Oro within a splendid tomb, for which Gerbert, afterwards Pope Silvester II., wrote an inscription.
In this vague design he was encouraged by Gerbert, the greatest scholar of the day, whom, as Silvester II., he raised to the papal throne.
But as the collection of authentic decretals does not begin till Siricius (385), the pseudo-Isidore first forges thirty letters, which he attributes to the popes from Silvester to Damasus; after this he includes the authentic decretals, with the intermixture of thirty-five apocryphal ones, generally given under the name of those popes who were not represented in the authentic collection, but sometimes also under the names of the others, for example, Damasus, St Leo, Vigilius and St Gregory; with one or two exceptions he does not interpolate genuine decretals.
And Henry III., who were then morally responsible for the pontificate, at length disgusted the Romans, who drove him out in 1044 and appointed Silvester III.
On the problems afforded by the chronology of Gerbert's (Pope Silvester II.) letters and by the notes in cipher in the MS. of his letters, he wrote L'Ecriture secrete de Gerbert (1877), which may be compared with his Notes tironiennes dans les dipldmes merovingiens (1885).
With the letters may be grouped the papal decrees of Gerbert when Silvester II.