His rectors were Baglione da Perugia and Guglielmo da Scesi, who, with Cerrettieri Bisdomini, were the persons with whom he consulted on public affairs. He imposed burdensome taxes upon the citizens; his decisions between contending parties were unjust; and that precision and humanity which he had at first assumed, became cruelty and pride;so that many of the greatest citizens and noblest people were, either by fines, death, or some new invention, grievously oppressed. And in completing the same bad system, both without the city and within, he appointed six rectors for the country, who beat and plundered the inhabitants. He suspected the great, although he had been benefited by them, and had restored many to their country; for he felt assured that the generous minds of the nobility would not allow them, from any motives, to submit contentedly to his authority. He also began to confer benefits and advantages upon the lowest orders, thinking that with their assistance, and the arms of foreigners, he would be able to preserve the tyranny. The month of May, during which feasts are held, being come, he caused many companies to be formed of the plebeians and very lowest of the people, and to these, dignified with splendid titles, he gave colors and money; and while one party went in bacchanalian procession through the city, others were stationed in different parts of it, to receive them as guests. As the report of the duke's authority spread abroad, many of French origin came to him, for all of whom he found offices and emoluments, as if they had been the most trustworthy of men; so that in a short time Florence became not only subject to French dominion, but adopted their dress and manners;for men and women, without regard to propriety or sense of shame, imitated them. But that which disgusted the people most completely was the violence which, without any distinction of quality or rank, he and his followers committed upon the women.
The people were filled with indignation, seeing the majesty of the state overturned, its ordinances annihilated, its laws annulled, and every decent regulation set at naught; for men unaccustomed to royal pomp could not endure to see this man surrounded with his armed satellites on foot and on horseback; and having now a closer view of their disgrace, they were compelled to honor him whom they in the highest degree hated. To this hatred, was added the terror occasioned by the continual imposition of new taxes and frequent shedding of blood, with which he impoverished and consumed the city.
The duke was not unaware of these impressions existing strongly in the people's minds, nor was he without fear of the consequences; but still pretended to think himself beloved; and when Matteo di Morozzo, either to acquire his favor or to free himself from danger, gave information that the family of the Medici and some others had entered into a conspiracy against him he not only did not inquire into the matter, but caused the informer to be put to a cruel death. This mode of proceeding restrained those who were disposed to acquaint him of his danger and gave additional courage to such as sought his ruin. Bertone Cini, having ventured to speak against the taxes with which the people were loaded, had his tongue cut out with such barbarous cruelty as to cause his death. This shocking act increased the people's rage, and their hatred of the duke; for those who were accustomed to discourse and to act upon every occasion with the greatest boldness, could not endure to live with their hands tied and forbidden to speak.
This oppression increased to such a degree, that not merely the Florentines, who though unable to preserve their liberty cannot endure slavery, but the most servile people on earth would have been roused to attempt the recovery of freedom; and consequently many citizens of all ranks resolved either to deliver themselves from this odious tyranny or die in the attempt. Three distinct conspiracies were formed; one of the great; another of the people, and the third of the working classes; each of which, besides the general causes which operated upon the whole, were excited by some other particular grievance. The great found themselves deprived of all participation in the government; the people had lost the power they possessed, and the artificers saw themselves deficient in the usual remuneration of their labor.
Agnolo Acciajuoli was at this time archbishop of Florence, and by his discourses had formerly greatly favored the duke, and procured him many followers among the higher class of the people. But when he found him lord of the city, and became acquainted with his tyrannical mode of proceeding, it appeared to him that he had misled his countrymen;and to correct the evil he had done, he saw no other course, but to attempt the cure by the means which had caused it. He therefore became the leader of the first and most powerful conspiracy, and was joined by the Bardi, Rossi, Frescobaldi, Scali Altoviti, Magalotti, Strozzi, and Mancini. Of the second, the principals were Manno and Corso Donati, and with them the Pazzi, Cavicciulli, Cerchi, and Albizzi. Of the third the first was Antonio Adimari, and with him the Medici, Bordini, Rucellai, and Aldobrandini. It was the intention of these last, to slay him in the house of the Albizzi, whither he was expected to go on St. John's day, to see the horses run, but he not having gone, their design did not succeed. They then resolved to attack him as he rode through the city; but they found this would be very difficult; for he was always accompanied with a considerable armed force, and never took the same road twice together, so that they had no certainty of where to find him. They had a design of slaying him in the council, although they knew that if he were dead, they would be at the mercy of his followers.