The Gothic element, so cautiously adopted by Niccola, is used with sympathy and freedom by his son, whose masterpiece, the pulpit of S. Andrea at Pistoja, might be selected as the supreme triumph of Italian Gothic sculpture. The superiority of that complex and consummate work of plastic art over the pulpit of the Pisan Baptistery, in all the most important qualities of style and composition, can scarcely be called in question. Its only serious fault is an exaggeration of the height of the pillars in proportion to the size of the hexagon they support. Like the pulpits of the Baptistery, of the Duomo of Pisa, and of the Duomo of Siena, it combines bas-reliefs and detached statues, carved capitals, and sculptured lions, in a maze of marvellous invention; but it has no rival in the architectonic effect of harmony, and the masterly feeling for balanced masses it displays. The five subjects chosen by Giovanni for his bas-reliefs are the "Nativity," the "Adoration of the Magi," the "Massacre of the Innocents," the "Crucifixion," and the "Last Judgment." In the "Nativity" our Lady is no longer the Roman matron of Niccola's conception, but a graceful mother, young in years, and bending with the weakness of childbirth. Her attitude, exquisite by the suggestion of tenderness and delicacy, is one that often reappears in the later work of the Pisan school--for example, in the rough _abozzamento_ in the Campo Santo at Pisa, above the north door of the Duomo at Lucca, and at Orvieto on the façade of the cathedral; but it has nowhere else been treated with the same sense of beauty. The "Massacre of the Innocents," compared with this relief, is a tragedy beside an idyll. Here the whole force of Giovanni's eminently dramatic genius comes into full play. Not only has he treated the usual incidents of mothers struggling with soldiers and bewailing their dead darlings, but he has also introduced a motive, which might well have been used by subsequent artists in dealing with the same subjects. Herod is throned in one corner of the composition; before him stand a group of men and women, some imploring the tyrant for mercy, some defying him in impotent despair, and some invoking the curse of God upon his head. In the "Adoration of the Magi," again, Giovanni shows originality by the double action he has chosen to develop. On one side the kings are sleeping, while an angel comes to wake them, pointing out the star. On the other side they fall at the feet of the Madonna. It will be gathered even from these bare descriptions that Giovanni introduced a stir of life and movement, and felt his subjects with a poetic intensity, alien to the ideal of Graeco-Roman sculpture. He effected a fusion between the grand style revived by Niccola and the romantic fervour of the modern imagination. It was in this way that the tradition handed down by him proved inestimably serviceable to the painters.