HKB
Madonna with the Child in her arms, surrounded by a circle of sunlight, and beneath is the Emperor Octavian, to whom the Tiburtine Sibyl is showing Jesus Christ, and he is adoring Him; and the figures in this work, as it has been said in other places, have been much better preserved than the others, because those that are on the vaulting are less injured by dust than those that are made on the walls.
After these works Pietro went to Tuscany, in order to see the works of the other disciples of his master Giotto and those of Giotto himself; and with this occasion he painted many figures in S. Marco in Florence, which are not seen to-day, the church having been whitewashed, except the Annunciation, which stands covered beside the principal door of the church. In S. Basilio, also, in the Canto alla Macine, he made another Annunciation in fresco on a wall, so like to that which he had made before in S. Marco, and to another one that is in Florence, that some believe, and not without probability, that they are all by the hand of this Pietro; and in truth they could not be more like, one to another, than they are. Among the figures that he made in the said S. Marco in Florence was the portrait of Pope Urban V from the life, with the heads of S. Peter and S. Paul; from which portrait Fra Giovanni da Fiesole copied that one which is in a panel in S. Domenico, also of Fiesole; and that was no small good-fortune, seeing that the portrait which was in S. Marco and many other figures that were about the church in fresco were covered with whitewash, as it has been said, when that convent was taken from the monks who occupied it before and given to the Preaching Friars, the whole being whitewashed with little attention and consideration.
Passing afterwards, in returning to Rome, through Assisi, not only in order to see those buildings and those notable works made there by his master and by some of his fellow-disciples, but also to leave something there by his own hand, he painted in fresco in the lower Church of S. Francesco--namely, in the transept that is on the side of the sacristy--a Crucifixion of Jesus Christ, with men on horseback armed in various fashions, and with many varied and extravagant costumes of diverse foreign peoples. In the air he made some angels, who, poised on their wings in diverse attitudes, are in a storm of weeping; and some pressing their hands to their breasts, others wringing them, and others beating the palms, they are showing that they feel the greatest grief at the death of the Son of God; and all, from the middle backwards, or rather from the middle downwards, melt away into air. In this work, well executed in the colouring, which is fresh and vivacious and so well contrived in the junctions of the plaster that the work appears all made in one day, I have found the coat of arms of Gualtieri, Duke of Athens; but by reason of there not being either a date or other writing there, I cannot affirm that it was caused to be made by him. I say, however, that besides the firm belief of everyone that it is by the hand of Pietro, the manner could not be more like his than it is, not to mention that it may be believed, this painter having lived at the time when Duke Gualtieri was in Italy, that it was made by Pietro as well as by order of the said Duke. At least, let everyone think as he pleases, the work, as ancient, is worthy of nothing but praise, and the manner, besides the public voice, shows that it is by the hand of this man.