CHAPTER IV. THE REPUBLICS. The different Physiognomies of the Italian Republics--The Similarity of their Character as Municipalities--The Rights of Citizenship--Causes of Disturbance in the Commonwealths--Belief in the Plasticity of Constitutions--Example of Genoa--Savonarola's Constitution--Machiavelli's Discourse to Leo X .-- Complexity of Interests and Factions--Example of Siena--Small Size of Italian Cities--Mutual Mistrust and Jealousy of the Commonwealths--The notable Exception of Venice--Constitution of Venice--Her wise System of Government--Contrast of Florentine Vicissitudes--The Magistracies of Florence--Balia and Parlamento--The Arts of the Medici--Comparison of Venice and Florence in respect to Intellectual Activity and Mobility--Parallels between Greece and Italy--Essential Differences--The Mercantile Character of Italian Burghs--The 'Trattato del Governo della Famiglia'-- The Bourgeois Tone of Florence, and the Ideal of a Burgher--Mercenary Arms P.193..