Among the many nephews whom Sixtus IV. had raised to eminence, the most distinguished was Giuliano della Rovere, Cardinal of S. Pietro in Vincoli, and Bishop of Ostia. This man possessed a fiery temper, indomitable energy, and the combative instinct which takes delight in fighting for its own sake. Nature intended him for a warrior; and, though circumstances made him chief of the Church, he discharged his duties as a Pontiff in the spirit of a general and a conqueror. When Julius II. was elected in November 1503, it became at once apparent that he intended to complete what his hated predecessors, the Borgias, had begun, by reducing to his sway all the provinces over which the See of Rome had any claims, and creating a central power in Italy. Unlike the Borgias, however, he entertained no plan of raising his own family to sovereignty at the expense of the Papal power. The Della Roveres were to be contented with their Duchy of Urbino, which came to them by inheritance from the Montefeltri. Julius dreamed of Italy for the Italians, united under the hegemony of the Supreme Pontiff, who from Rome extended his spiritual authority and political influence over the whole of Western Europe. It does not enter into the scheme of this book to relate the series of wars and alliances in which this belligerent Pope involved his country, and the final failure of his policy, so far as the liberation of Italy from the barbarians was concerned. Suffice it to say, that at the close of his stormy reign he had reduced the States of the Church to more or less complete obedience, bequeathing to his successors an ecclesiastical kingdom which the enfeebled condition of the peninsula at large enabled them to keep intact. There was nothing petty or mean in Julius II.; his very faults bore a grandiose and heroic aspect. Turbulent, impatient, inordinate in his ambition, reckless in his choice of means, prolific of immense projects, for which a lifetime would have been too short, he filled the ten years of his pontificate with a din of incoherent deeds and vast schemes half accomplished. Such was the man who called Michelangelo to Rome at the commencement of 1505. Why the sculptor was willing to leave his Cartoon unfinished, and to break his engagement with the Operai del Duomo, remains a mystery. It is said that the illustrious architect, Giuliano da San Gallo, who had worked for Julius while he was cardinal, and was now his principal adviser upon matters of art, suggested to the Pope that Buonarroti could serve him admirably in his ambitious enterprises for the embellishment of the Eternal City. We do not know for certain whether Julius, when he summoned Michelangelo from Florence, had formed the design of engaging him upon a definite piece of work. The first weeks of his residence in Rome are said to have been spent in inactivity, until at last Julius proposed to erect a huge monument of marble for his own tomb.