Before the building of the Palazzo de’ Signori in 1292 the Priors met in the Cerchi palace in Via del Garbo, now divided into many houses. Only vestiges of their towers, and of their once famous loggia, can still be traced at the corner of Via de’ Cerchi and Via de’ Cimatori. Piero Monaldi writes in his manuscript history of the ancient family of the Cerchi that they came from Acone, “of which place they were lords and also of Ripozzano. In Florence they owned towers, a loggia and sumptuous palaces, which were destroyed during the civil strife and discord. A noble race they were, rich and powerful in the city, with many retainers, munificent and lordly in the country side. But fate, enemy of their felicity, divided their house in the time of Pope Boniface VIII. Some became heads of the White party whilst others remained of the Black, so that they were undone and many of their records were lost wherein were mentioned numerous honourable lords. But the fame of Vieri de’ Cerchi remains, one of the greatest knights of his day and Prince of the White party. When called to Rome by Pope Boniface to try and pacify the said parties he went thither with many men at arms, all his own followers, which rather alarmed the Pope. There were also Niccolò Gentile and Borrigiano and all were knights of the Golden Spur.”26 Vieri de’ Cerchi was the great antagonist of Corso Donati, head of the Black party, and “Florence,” writes Giovanni Villani, “was kept in such turmoil and danger by their enmity, that the city was often in an uproar, and every one was under arms.”

The palace came into the possession of the Bandini family, and it is said that the details of the Pazzi conspiracy were arranged here in the time of Bernardo Bandini [1478], and that his descendant Giovanni betrayed Florence to the Imperialists by signals from the top of the tower in 1530.