It was in the seventeenth century that the palace passed to the Riccardi family, who made many additions. A century later Florence acquired it, and to-day it is the seat of the Prefect of the city. Cosimo's original building was smaller; but much of it remains untouched. The exquisite cornice is Michelozzo's original, and the courtyard has merely lost its statues, among which are Donatello's Judith, now in the Loggia de' Lanzi, and his bronze David, now in the Bargello, while Verrocchio's David was probably on the stairs. The escutcheon on the corner of the house gives us the period of its erection. The seven plain balls proclaim it Cosimo's. Each of the Medici sported these palle, although each had also his private crest. Under Giovanni, Cosimo's father, the balls were eight in number; under Cosimo, seven; under Piero, seven, with the fleur-de-lis of France on the uppermost, given him by Louis XI; under Lorenzo, six; and as one walks about Florence one can approximately fix the date of a building by remembering these changes. How many times they occur on the façades of Florence and its vicinity, probably no one could say; but they are everywhere. The French wits, who were amused to derive Catherine de' Medici from a family of apothecaries, called them pills. The beautiful lantern at the corner was added by Lorenzo and was the work of an odd ironsmith in Florence for whom he had a great liking--Niccolò Grosso. For Lorenzo had all that delight in character which belongs so often to the born patron and usually to the born connoisseur. This Grosso was a man of humorous independence and bluntness. He had the admirable custom of carrying out his commissions in the order in which they arrived, so that if he was at work upon a set of fire-irons for a poor client, not even Lorenzo himself (who as a matter of fact often tried) could induce him to turn to something more lucrative. The rich who cannot wait he forced to wait. Grosso also always insisted upon something in advance and payment on delivery, and pleasantly described his workshop as being the Sign of the Burning Books,--since if his books were burnt how could he enter a debt? This rule earned for him from Lorenzo the nickname of "Il Caparra" (earnest money). Another of Grosso's eccentricities was to refuse to work for Jews. Within the palace, up stairs, is the little chapel which Gozzoli made so gay and fascinating that it is probably the very gem among the private chapels of the world. Here not only did the Medici perform their devotions--Lorenzo's corner seat is still shown, and anyone may sit in it--but their splendour and taste are reflected on the walls. Cosimo, as we shall see when we reach S. Marco, invited Fra Angelico to paint upon the walls of that convent sweet and simple frescoes to the glory of God. Piero employed Fra Angelico's pupil, Benozzo Gozzoli to decorate this chapel.