In the ducal palace at Poggio a Caiano, there is a fresco picture of Cæsar, seated in a hall, ornamented with statues, on a lofty seat, to whom a great variety of exotic birds and wild animals are presented as the tribute of his victories; a work of itself sufficient to mark Andrea as a painter eminent in perspective, in a knowledge of the antique, and in every excellence of painting. The order for ornamenting that palace came from Leo X.; and Andrea, who had there to contend with Franciabigio and Pontormo, exerted all his energy to please that encourager of art, and to surpass his competitors. The other artists seem to have been discouraged, and did not proceed: some years after Alessandro Allori put a finishing hand to the hall. The royal palace possesses a treasure in the oil pictures of Andrea. Independent of the S. Francis, the Assumption, and other pictures, collected by the family of the Medici, the Grand Duke Leopold purchased a very fine _Pietà_ from the nuns of Lugo, and placed it in the Tribune as an honour to the school. The introduction of S. Peter and S. Paul in that piece, contrary to historical facts, is not the error of the painter who represented them so admirably, but of those who commissioned the picture. Critics have remarked a slight defect in the dead Christ, which they think sustains itself more, and has a greater fulness of the veins, than is suitable to a dead body: but this is immaterial in a picture the other parts of which are designed, coloured, and composed, so as to excite astonishment. A Last Supper, if it were not confined to the cloisters of the monastery of S. Salvi, would, perhaps, be equally admired. The soldiers who besieged Florence in 1529, and destroyed the suburbs of the city, undoubtedly admired it: after demolishing the belfry, the church, and part of the monastery, they were astonished on beholding this Last Supper, and had not resolution to destroy it; imitating that Demetrius who, at the siege of Rhodes, is said to have respected nothing but a picture by Protegenes.[170]