The deaths of Giovanni Galeazzo and Ladislaus freed the city from her most formidable external foes; and for a while she became the seat of the Papacy, the centre of Christendom. In 1419, after the schism, Pope Martin V. took up his abode in Florence; the great condottiere, Braccio, came with his victorious troops to do him honour; and the deposed John XXIII. humbled himself before the new Pontiff, and was at last laid to rest among the shadows of the Baptistery. In his _Storia Florentina_ Guicciardini declares that the government at this epoch was the wisest, the most glorious and the happiest that the city had ever had. It was the dawn of the Renaissance, and Florence was already full of artists and scholars, to whom these _nobili popolani_ were as generous and as enlightened patrons as their successors, the Medici, were to be. Even Cosimo's fervent admirer, the librarian Vespasiano Bisticci, endorses Guicciardini's verdict: "In that time," he says, "from 1422 to 1433, the city of Florence was in a most blissful state, abounding with excellent men in every faculty, and it was full of admirable citizens." Maso degli Albizzi died in 1417; and his successors in the oligarchy--the aged Niccolò da Uzzano, who stood throughout for moderation, and the fiery but less competent Rinaldo degli Albizzi--were no match for the rising and unscrupulous Medici. With the Albizzi was associated the noblest and most generous Florentine of the century, Palla Strozzi. The war with Filippo Visconti, resulting in the disastrous rout of Zagonara, and an unjust campaign against Lucca, in which horrible atrocities were committed by the Florentine commissioner, Astorre Gianni, shook their government. Giovanni dei Medici, the richest banker in Italy, was now the acknowledged head of the opposition; he had been Gonfaloniere in 1421, but would not put himself actively forward, although urged on by his sons, Cosimo and Lorenzo. He died in 1429; Niccolò da Uzzano followed him to the grave in 1432; and the final struggle between the fiercer spirits, Rinaldo and Cosimo, was at hand. "All these citizens," said Niccolò, shortly before his death, "some through ignorance, some through malice, are ready to sell this republic; and, thanks to their good fortune, they have found the purchaser." Shortly before this date, Masaccio painted all the leading spirits of the time in a fresco in the cloisters of the Carmine. This has been destroyed, but you may see a fine contemporary portrait of Giovanni in the Uffizi. The much admired and famous coloured bust in the Bargello, called the portrait of Niccolò da Uzzano by Donatello, has probably nothing to do either with Niccolò or with Donatello. Giovanni has the air of a prosperous and unpretending Florentine tradesman, but with a certain obvious parade of his lack of pushfulness.