The name of Albizzi appears for the first time in the annals of Florence in 1251, when Benincasa di Albizzo was an Elder. In 1282 Ser Compagno was the first of the long list of ninety-eight Priors of the house of Albizzi who sat in the Palazzo de’ Signori. Piero, the son of Filippo, the first Gonfalonier of Justice of thirteen the family gave to Florence, became immensely rich and by his prudence and sagacity obtained such preponderance in the affairs of the city that he was the recognized head of the _nobili popolani_. Acute rivalry between the Ghibelline Albizzi and the Ricci, who were Guelphs, had always existed; and Uguccione de’ Ricci, thinking to crush his rivals, advocated the revival of the magistrature of the Captains of the Guelph party, proposing at the same time that all who professed themselves Ghibellines should be admonished, _i. e._ excluded from all offices of state. Piero di Albizzo, to hide his Ghibelline tendencies, not only made no opposition, but took a foremost part in the doings of the tribunal, which became odious to the Florentines under his presidency. The Ciompi revolt was the direct consequence of the tyranny of the Captains of the Guelph party, Piero was beheaded and the other members of the Albizzi family were banished, only to return more powerful when the old system of government was revived in 1381. According to Passerini it was to the wise administration of Maso, Piero’s nephew, that the prosperity and the greatness of Florence, feared and respected by the other Italian Republics, were due. “He formed political relations apt to preserve the prosperity of the Republic, built great public edifices, protected nascent studies and arts and promoted the foundation of the Florentine University, the basis of the literary glory afterwards culled by the Medici family. The wars against the Visconti were prosecuted with constancy and without losses; indeed the state was enlarged, a thing which could not have happened amid such conflicting opinions as then reigned in Florence, if the man at the head of affairs had not been a politician of the first order.”[9] Maso degl’Albizzi died in 1417 and his son Rinaldo inherited part of his father’s vast wealth and his ambition, but not his caution. The oligarchy of the _nobili popolani_ became odious under his leadership, and the strong party led, but not ostensibly, by Cosmo de’ Medici, divided the city into two hostile factions. The death of that wise old citizen Niccolò da Uzzano, who had kept Rinaldo in check was, writes Machiavelli, “a misfortune for Florence, as Messer Rinaldo, thinking now to be head of the party, never ceased entreating and worrying all the citizens he thought might become Gonfaloniers, to rise and liberate the country from the man destined, through the malignity of some and the ignorance of the many, to enslave it.” Albizzi’s friend, Bernardo Guadagni, whose debts he paid in order to enable him to