Messer Giovanni developed extraordinary strength of character; he was a born ruler of men, and a passionate patriot.  He gained the goodwill of his fellow-citizens by his unselfishness and generosity—­truly not too common in the bearing of men of his time.  He served the office of Prior in 1402, 1408, 1411; he was ambassador to Naples in 1406, and to Pope Alessandro V. in 1409; and, in 1407, he held the lucrative post of Podesta of Pistoja.

In 1421 Messer Giovanni de’ Medici was elected Gonfaloniere di Giustizia, as the representative of the middle classes, and in opposition to Messeri Rinaldo degli Albizzi and Niccolo da Uzzano, the Ghibelline nominees.  The Republic sighed for peace, the crafts for quietness; but the immense liabilities incurred by many costly military enterprises had to be met.  Messer Giovanni proposed, in 1427, a tax which should not weigh too heavily upon anybody.  Each citizen who was possessed of a capital of one hundred gold florins, or more, was mulcted in a payment to the State of half a gold florin (ten shillings circa).  This tax, which was called “Il Catasto” was unanimously accepted—­“it pleased the common people greatly.”  Messer Giovanni was taxed as heavily as anyone, namely, three hundred gold florins—­indicative, incidentally, of his wealth and honesty.

Giovanni associated with himself another prominent man, Messer Agnolo de’ Pandolfini, the leader of the “Peace-at-any-Price” party, who is remembered in the annals of Florence as “The Peaceful Citizen.”  The main points of their policy were:—­(1) Peace abroad; (2) Prosperity at home; (3) Low taxation.

No combination of his opponents—­and they were many and unscrupulous—­was able to damage Messer Giovanni’s reputation and power.  He could, had he wished it, have proclaimed himself sole ruler of Florence and her territory; but self-control and prudence—­which were so characteristic of the men of his family—­never forsook him.  He died universally regretted in 1429, and was buried in the church of San Lorenzo, which he, along with the Martelli, had restored and endowed.  Giovanni di Averardo de’ Medici was looked upon as the first banker in Italy, the controller of the credit of Florence and the prince of financiers.  Cavalcanti, Macchiavelli, Ammirato, and almost all other historians, describe him as “Large-hearted, liberal-minded, courteous and charitable, dispensing munificent alms with delicate consideration of the feelings and wants of those whom he assisted.  Never suing for honours, he gained them all.  Hostile to public peculations he strove disinterestedly for the public good.  He died rich in this world’s goods, but richer still in the goodwill of his fellow citizens.”

Many have sought, nevertheless, to belittle Messer Giovanni’s reputation—­attributing to him a motive for all his urbanity—­that of the permanent domination of his house in the government of the Republic—­not surely a fault.  His old rival in the arena of politics, Niccolo da Uzzano, ever spoke of him after his death with unstinted praise and admiration.