it of S. Dominic was changed
for that of S. Peter.

Bramante at that time had caused two windows of travertine to be made in
the Palace of the Pope, which were in the hall in front of the chapel,
now embellished by a vaulted ceiling by Antonio da San Gallo, and by
marvellous stucco-work from the hand of Perino del Vaga of Florence.
These windows were executed by Maestro Claudio and Guglielmo, although
afterwards, during the sack of Rome, they were broken to pieces, in
order to extract the lead to make harquebus-balls; and they were truly
marvellous. In addition to these, they made an endless number of them
for the apartments of the Pope, which met with the same fate as the
other two. And even now there is one to be seen in the room containing
Raffaello's Burning of the Borgo, in the Borgia Tower; in which are
angels who are holding the escutcheon of Leo X. They also made two
windows for the chapel behind the Madonna in S. Maria del Popolo, with
the stories of her life, which were highly praiseworthy examples of that
craft.

These works brought them no less fame and renown than comfort in
life. But Maestro Claudio, being very intemperate in eating and
drinking, according to the custom of his race, which is a deadly
thing in the air of Rome, fell sick of so violent a fever, that in
six days he passed to the other life. Whereupon Guglielmo, left
alone, and almost like one lost without his companion, painted by
himself a window, likewise of glass, in S. Maria de Anima, the
church of the Germans in Rome; which was the reason that Cardinal
Silvio of Cortona made him an offer, and made a contract with him
that he should execute some windows and other works in his native
city of Cortona. Wherefore the Cardinal took him in his company to
take up his abode in Cortona; and the first work that he executed
was the facade of the Cardinal's house on the side towards the
Piazza, which he painted in chiaroscuro, depicting therein Croton
and the other original founders of that city. Thereupon the
Cardinal, who saw that Guglielmo was no less upright as a man than
excellent as a master of that art, caused him to execute, for the
Pieve of Cortona, the window of the principal chapel, in which he
made the Nativity of Christ and the Magi adoring Him.

Guglielmo was a man of fine spirit and intelligence, and of very
great mastery in handling glass, and particularly in so distributing
the colours that the brightest should come in the foremos