Little time now for temple-building. Gismondo, before Siena, had amused himself with drawing out plans for the dome in intervals of battles and traitorous despatches. He now found enough to do in keeping Piccinino at bay. The Angevines were of no service; they had but estranged the sympathies of Italy from his cause. He tried even, it is said, to tempt the universal enemy of Christendom, the Grand Turk himself, to espouse his cause. There is no knowing to what lengths he would not go in his lonely, impotent, swift despair, and defiant ruin; and it is possible that he may have remembered the examples of Carlo Zeno and the great Visconti. One good and wise thing, at least, Gismondo did in these terrible years of friendless battle. He married the faithful Isotta, who proved herself a right valiant defender and regent of his city.
Meanwhile the Pope had enrolled himself among the active enemies of Sigismond. Siena was avenged. Amid great state and ceremony the effigy of Gismondo Malatesta was burned in the streets of Rome; interdict and excommunication were pronounced against him. Parricide, murderer of old men and innocent women, committer of adultery and incest, prince of traitors, enemy of God and man: so ran the terms of this tremendous accusation. But the Pope was not contented merely to accuse. He threatened not only Gismondo with his anathema, but whatsoever nation or army should arise to help him. Having thus disabled his enemy, he sent his forces against Rimini.
Sigismond, maddened and desperate, looked vainly round for an ally. Siena, Arragon, Florence, Milan, all were hostile, or at best neutral. Yet help must be found. Almost alone, facing a hundred perils, Gismondo trudged across the Apennines to the kingdom of Naples in search of his fatal friends the Angevines. But from them he got no help, not a promise even. Back to Rimini, desperate, baited, hurried the miserable Sigismond. Finding the towns still held out, he took to the sea, and went to Venice—praying in his abject extremity for succour, for protection. And the Venetians, bound to him by old ties, did indeed afford him a slender assistance. By the aid of this he escaped death and flagrant ruin. The Pope made peace with him, though only on condition that he and his brother Domenico should make public penance for their misdeeds at Rome, resigning all their possessions save their capitals and a few castles, which also must devolve to the Holy See after the deaths of their present lords. And to these terms he consented. Nothing but his sword and his city were now left to the once triumphant Sigismond. Leaving Rimini to the staunch Isotta—_fœmina belligera et fortis_—he hired himself to the Venetians, to conduct their forces against the Turks in the Morea. Here a faint shadow of his former glory played for a while around him; and in 1465 Gismondo returned to Rimini, enriched, and bringing with him as his dearest possession the bones of Gemisthus Pletho, the Platonist, to place in the first sarcophagus of the temple.