Cosimo Rosselli leaves Florence for Rome, together with other Florentine painters, where he has been called as part of the reconciliation project between Lorenzo de' Medici, the de facto ruler of Florence, and Pope Sixtus IV. The Florentines start to work in the The Sistine Chapel as early as the Spring of 1481, along with Perugino, who is already there.
May 10th, 1508 :
"I record that on this tenth day of May, in the year one thousand five hundred and eight, I, Michelagniolo, sculptor, have received from his Holiness, our p.51lord Pope Julius the Second, five hundred ducats of the Camera, which were paid to me by Messer Carlino, Chamberlain, and by Messer Carlo degli Albizzi, on account of the paintings in the vault of the Chapel of Pope Sixtus, on which I begin to work this day, under the conditions and stipulations set forth in the document prepared by His Most Reverend Lordship of Pa(via) and subscribed by my hand.
"For the assistant painters who are to come from Florence, who will be five in number, twenty gold ducats of the Camera each, with this proviso : that is to say, when they have arrived and have entered into an agreement with us, the aforesaid twenty ducats which each will have received shall be reckoned as part of their wages, these wages to be due as from the day of their departure from Florence. And if they shall not enter into an agreement with us, they are to retain one-half of the said sum for the expenses of their journey and for their time."