Movement has never been suggested in stone with less exaggeration, nor have marble lips been made to utter sweeter and more varied music. Luca's true perception of the limits to be observed in sculpture, appears most eminently in the glazed terra-cotta work by which he is best known. An ordinary artist might have found the temptation to aim at showy and pictorial effects in this material overwhelming. Luca restrained himself to pure white on pale blue, and preserved an exquisite simplicity of line in all his compositions. There is an almost unearthly beauty in the profiles of his Madonnas, a tempered sweetness in the modulation of their drapery and attitude, that prove complete mastery in the art of rendering evanescent moments of expression, the most fragile subtleties of the emotions that can stir a tranquil spirit. Andrea della Robbia, the nephew of Luca, with his four sons, Giovanni, Luca, Ambrogio, and Girolamo, continued to manufacture the glazed earthenware of Luca's invention. These men, though excellent artificers, lacked the fine taste of their teacher. Coarser colours were introduced; the eye was dazzled with variety; but the power of speaking to the soul as Luca spoke was lost.[[99]]
After the Della Robbias, this is the place to mention Agostino di Gucci or di Duccio,[[100]] a sculptor who handled terra-cotta somewhat in the manner of Donatello's flat-relief, introducing more richness of detail and aiming at more passion than Luca's taste permitted. For the oratory of S. Bernardino at Perugia he designed the façade partly in stone and partly in baked clay—crowded with figures, flying, singing, playing upon instruments of music, with waving draperies and windy hair and the ecstasy of movement in their delicately modelled limbs. If nothing else remained of Agostino's workmanship, this façade alone would place him in the first rank of contemporary artists. He owed something, perhaps, to his material; for terra-cotta has the charm of improvisation. The hand, obedient to the brain, has made it in one moment what it is, and no slow hours of labour at the stone have dulled the first caprice of the creative fancy. Work, therefore, which, if translated into marble, might have left our sympathy unstirred, affects us with keen pleasure in the mould of plastic clay. What prodigality of thought and invention has been lavished on the terra-cotta models of unknown Italian artists! What forms and faces, beautiful as shapes of dreams, and, like dreams, so airy that we think they will take flight and vanish, lean to greet us from cloisters and palace fronts in Lombardy! To catalogue their multitude would be impossible. It is enough to select one instance out of many; this shall be taken from the chapel of S. Peter Martyr in S. Eustorgio at Milan. High up around the cupola runs a frieze of angels, singing together and dancing with joined hands, while bells composed of fruits and flowers hang down between them. Each angel is an individual shape of joy; the soul in each moves to its own deep melody, but the music made of all is one. Their raiment flutters, the bells chime; the chorus of their gladness falls like voices through a star-lit heaven, half-heard in dreams and everlastingly remembered.
Four sculptors, the younger contemporaries of Luca della Robbia, and marked by certain common qualities, demand attention next. All the work of Antonio Rossellino, Matteo Civitali, Mino da Fiesole, and Benedetto da Majano, is distinguished by sweetness, grace, tranquillity, and self-restraint—as though these artists had voluntarily imposed limits on their genius, refusing to trespass beyond a traced circle of religious subjects, or to aim at effects unrealisable by purity of outline, suavity of expression, delicacy of feeling, and urbanity of style. The charm of manner they possess in common, can scarcely he defined except by similes. The innocence of childhood, the melody of a lute or song-bird as distinguished from the music of an orchestra, the rathe tints of early dawn, cheerful light on shallow streams, the serenity of a simple and untainted nature that has never known the world—many such images occur to the mind while thinking of the sculpture of these men. To charge them with insipidity, immaturity, and monotony, would be to mistake the force of genius and skill displayed by them. We should rather assume that they confined themselves to certain types of tranquil beauty, without caring to realise more obviously striking effects, and that this was their way of meeting the requirements of sculpture considered as a Christian art. The melody of their design, meanwhile, is like the purest song-music of Pergolese or Salvator Rosa, unapproachably perfect in simple outline, and inexhaustibly refreshing.
Though it is possible to characterise the style of these sculptors by some common qualities observable in their work, it should rather be the aim of criticism to point out their differences. Antonio Rossellino, for example, might be distinguished by his leaning toward the manner of Ghiberti, whose landscape backgrounds he has adopted in the circular medallions of his monumental sculpture. A fine perception of the poetic capabilities of Christian art is displayed in Rossellino's idyllic treatment of the Nativity—the adoration of the shepherds, the hush of reverential stillness in the worship Mary pays her infant son.[[101]] To the qualities of sweetness and tranquillity rare dignity is added in the monument of the young Cardinal di Portogallo.[[102]] The sublimity of the slumber that is death has never been more nobly and feelingly portrayed than in the supine figure and sleeping features of this most beautiful young man, who lies watched by angels beneath a heavy-curtained canopy. The genii of eternal repose modelled by Greek sculptors are twin-brothers of Love, on whom perpetual slumber has descended amid poppy-fields by Lethe's stream. The turmoil of the world is over for them; they will never wake again; they do not even dream. Sleep is the only power that still has life in them. But the Christian cannot thus conceive the mystery of the soul "fallen on sleep." His art must suggest a time of waiting and a time of waking; and this it does partly through the ministration of attendant angels, who would not be standing there on guard if the clay-cold corpse had no futurity, partly by breathing upon the limbs and visage of the dead a spirit as of life suspended for a while. Thus the soul herself is imaged in the marble "most sweetly slumbering in the gates of dreams."
What Vespasiano tells us of this cardinal, born of the royal house of Portugal, adds the virtue of sincerity to Rossellino's work, proving there is no flattery of the dead man in his sculpture.[[103]] "Among his other admirable virtues," says the biographer, "Messer Jacopo di Portogallo determined to preserve his virginity, though he was beautiful above all others of his age. Consequently he avoided all things that might prove impediments to his vow, such as free discourse, the society of women, balls, and songs. In this mortal flesh he lived as though he had been free from it—the life, we may say, rather of an angel than a man. And if his biography were written from his childhood to his death, it would be not only an ensample, but confusion to the world. Upon his monument the hand was modelled from his own, and the face is very like him, for he was most lovely in his person, but still more in his soul."
While contemplating this monument of the young cardinal, we feel that the Italians of that age understood sepulchral sculpture far better than their immediate successors. They knew how to carve the very soul, according to the lines which our Webster, a keen observer of all things relating to the grave and death, has put into Jolenta's lips:—
But indeed,
If ever I would have mine drawn to the life,
I would have a painter steal it at such time
I were devoutly kneeling at my prayers;