Masaccio was born at Castello S. Giovanni, on the way to Arezzo.  He was the son of a notary, Ser Giovanni di Simone Guidi, called della Scheggia, and his first labours in art, Vasari tells us, were begun at the time when Masolino was working at this chapel in the Carmine.  He had evidently been much impressed by the work of Donato, and, indeed, something of the realism of sculpture has passed into his work, in the St. Peter Baptizing, for instance, where he who stands by the side of the pool, awaiting his turn, has much of the reality of a statue.  And then with a magical sincerity Masaccio has understood the mere discomfort of such a delay in the cool air, and a shiver seems about to pass over that body, which is as real to us as any figure in the work of Michelangelo.  Or again, in the fresco of the Tribute Money, how real and full of energy these people are,—­the young man with his back to us, who has been interrupted; Jesus Himself, who has just interposed; Peter, who is protesting.  How full of a real majesty is this composition, admirably composed, too, and original even in that.  Here, it might seem, we have the end of merely decorative painting, the beginning of realism, of the effect of reality, and it is therefore with surprise we see so facile a master as Filippino Lippi set to finish work of such elemental and tremendous genius.  How pretty his work seems beside these realities.

Coming out into the Piazza again, and turning to the left down Via S. Frediano, you come almost at once, on the right, to the Church of S. Frediano in Castello.  You may enter it from Lung’ Arno, but it would scarcely be worth a visit, for it is a late seventeenth-century building, save that in the convent may still be found the cell of S. Maria Maddalena de’ Pazzi; for it was this convent that the Carmelite nuns exchanged with the Cistercians for the house in Via di Pinti, called to-day S. Maria Maddalena de’ Pazzi, where Perugino painted his beautiful fresco of the Crucifixion.

Just across the way is the Mercato di S. Frediano and the suppressed monastery of the Camaldolese, now a school; and by this way you come to Porta S. Frediano, by which Charles VIII of France entered Florence and Rinaldo degli Albizzi left it.  The whole of this quarter is given up to the poor and to the Madonna of the street corner, for here her children dwell, the outcasts and refuse of civilisation who work that we may live.  It is always with reluctance, in spite of the children that I come by this way, so that if possible I always return by Lung’ Arno, past Torrino di S. Rosa and the barracks of S. Friano and the grain store of Cosimo III, past the houses of the Soderini to Ponte alla Carraia, which fell on Mayday 1304, sending so many to that other world they had come out to see, and so past the house of Piero Capponi, the hero of 1494 who kept the Medici at bay, and threatened Charles VIII in the council; then turning down Via Coverelli one comes to Santo Spirito.