Antonio built the Fortress of Perugia, at the time when there was discord between the people of that city and the Pope; and that work, for which the houses of the Baglioni were thrown to the ground, was finished with marvellous rapidity, and proved to be very beautiful. He also built the Fortress of Ascoli, bringing it in a few days to such a condition that it could be held by a garrison, although the people of Ascoli and others did not think that it could be carried so far in many years; wherefore it happened that, when the garrison was placed in it so quickly, those people were struck with astonishment, and could scarce believe it. He also refounded his own house in the Strada Giulia at Rome, in order to protect himself from the floods that rise when the Tiber is swollen; and he not only began, but in great part completed, the palace that he occupied near S. Biagio, which now belongs to Cardinal Riccio of Montepulciano, who has finished it, adding most ornate apartments, and spending upon it vast sums in addition to what had been spent by Antonio, which was some thousands of crowns. But all that Antonio did to the benefit and advantage of the world is as nothing in comparison with the model of the venerable and stupendous fabric of S. Pietro at Rome, which, planned in the beginning by Bramante, he enlarged and rearranged with a new plan and in an extraordinary manner, giving it dignity and a well-proportioned composition, both as a whole and in its separate parts, as may be seen from the model made of wood by the hand of his disciple, Antonio L'Abacco, who carried it to absolute perfection. This model, which gave Antonio a very great name, was published in engraving after the death of Antonio da San Gallo, together with the ground-plan of the whole edifice, by the said Antonio L'Abacco, who wished to show in this way how great was the genius of San Gallo, and to make known to all men the opinion of that architect; for new plans had been proposed in opposition by Michelagnolo Buonarroti, and out of this change of plans many contentions afterwards arose, as will be related in the proper place. It appeared to Michelagnolo, and also to many others who saw the model of San Gallo, and such parts as were carried into execution by him, that Antonio's composition was too much cut up by projections and by members which are too small, as are also the columns, the arches upon arches, and the cornices upon cornices. Besides this, it seems not to be approved that the two bell-towers in his plan, the four little tribunes, and the principal cupola, should have that ornament, or rather, garland of columns, many and small. In like manner, men did not much approve, nor do they now, of those innumerable pinnacles that are in it as a finish to the work; and it appears that in that model he imitated the style and manner of the Germans rather than the good manner of the ancients, which is now followed by the best architects. The above-mentioned model of S.