The collections, too, of foreign animals not only gratified curiosity, but served also the higher purposes of observation. The facility of transport from the southern and eastern harbors of the Mediterranean, and the mildness of the Italian climate, made it practicable to buy the largest animals of the south, or to accept them as presents from the Sultans. The cities and princes were especially anxious to keep live lions even where a lion was not, as in Florence, the emblem of the State. The lions' den was generally in or near the government palace, as in Perugia and Florence; in Rome, it lay on the slope of the Capitol. The beasts sometimes served as executioners of political judgements, and no doubt, apart from this, they kept alive a certain terror in the popular mind. Their condition was also held to be ominous of good or evil. Their fertility, especially, was considered a sign of public prosperity, and no less a man than Giovanni Villani thought it worth recording that he was present at the delivery of a lioness. The cubs were often given to allied States and princes, or to Condottieri as a reward of their valor. In addition to the lions, the Florentines began very early to keep leopards, for which a special keeper was appointed. Borso of Ferrara used to set his lion to fight with bulls, bears, and wild boars.
