Note 31 — BOOK III.

Vasari states, that that event occurred either whilst Michaelangelo was employed upon the Statues in S. Pietro in Vincoli, or whilst he was painting the vault of the Sistine Chapel, that is, some years afterwards, when Raffaello was in Rome. To this second opinion, which is the most common one, I formerly assented; but since, on perusal of a Brief of Julius II. (Lett. Pittoriche, tom. iii. p. 320) in which that Pope invites Michael Angelo back to Rome, and promises that illæsus, inviolatusque erit, I am inclined to believe that the Cartoon was finished in 1506, which is the date of the brief; so that Raffaello, if he could not see it on his first visit to Florence, might at least have done so on his second or third.