enclosed within a vicious circle, in which it moved for nearly a century neither backwards nor forwards: painters were satisfied with suggestion; and as long as they were satisfied, no progress was possible. From this Giottesque treadmill, painting was released by the intervention of another art. The painters were hopelessly mediocre; their art was snatched from them by the sculptors. Orcagna himself, perhaps the only Giottesque who gave painting an onward push, had modelled and cast one of the bronze gates of the Florence baptistery; the generation of artists who arose at the beginning of the fifteenth century, and who opened the period of the Renaissance, were sculptors or pupils of sculptors. When we see these vigorous lovers of Nature, these heroic searchers after truth, suddenly pushing aside the decrepit Giottesque allegory-mongers, we ask ourselves in astonishment whence they have arisen, and how those broken-down artists of effete art could have begotten such a generation of giants. Whence do they come? Certainly not from the studios of the Giottesques; no, they issue out of the workshops of the stone-mason, of the goldsmith, of the worker in bronze, of the sculptor. Vasari has preserved the tradition that Masolino and Paolo Uccello were apprentices of Ghiberti; he has remarked that their greatest contemporary, Masaccio, "trod in the steps of Brunelleschi and of Donatello." Pollaiolo and Verrocchio we know to have been equally excellent as painters and as workers in bronze; sculpture, at once more naturalistic and more constantly under the influence of the antique, had for the second time laboured for painting. Itself a subordinate art, without real vitality, without deep roots in the civilization, sculpture was destined to remain the unsuccessful pupil of the antique, and the unsuccessful rival of painting; but sculpture had for its mission to prepare the road for painting and to prepare painting for antique influence, and the noblest work of Ghiberti and Donatello was Masaccio, as the most lasting glory to the Pisani had been Giotto.