Among the great artists, in the highest sense of that word, and one of the great sculptors of this period must be reckoned Luca della Robbia, with whose name there are naturally associated the names of others of this family, and particularly Andrea. Luca was chosen as one of the sculptors to execute {89} portions of the decorative work of the Duomo at Florence. He did one of the famous _cantorias_, the two sculptured marble singing galleries which are unfortunately no longer in the Duomo itself, but in the museum at the Eastern end of the great church. This was finished in 1438, when Luca, whose years run coincident with the century, was thirty-eight years of age. Among the artists from whom the Florentine officials might have chosen for the execution of these singing galleries was also Donatello, who actually modelled the other of the pair, and Ghiberti, since famous for the great doors of the Baptistery. It is sufficient to say that when Luca della Robbia's singing gallery was finished, the Florentines realized very well that no mistake had been made in giving him the execution of it, even though he had such great rivals. This is almost the only great work in marble that we have from Luca della Robbia. He was a scientist, as well as an artist, and he was very much interested in artistic glazed work. He devoted himself to making this as perfect as possible and succeeded in adding this as a wonderful new medium to sculpture. Like so many other of the artists, painters and sculptors of this time, he was originally a goldsmith, but became ambitious of doing higher things than those usually committed to the craftsmen. Vasari tells us that he carved all day and drew all night, keeping his feet warm through the long winter evenings by covering them up in a basketful of carpenter shavings. He worked at the glazing of terra-cotta with the idea at first apparently of preserving his clay models by baking them. Working in this new medium he brought to the execution of the models for it all his genius as a sculptor and succeeded in accomplishing some of the most beautiful results. He developed the medium so as to secure charming color, creamy white figures that stand out from a cloudy blue background, with a glaze that is perfect and joints that are almost invisible. It is only in comparatively recent years that a due meed of appreciation has been accorded to della Robbia's work once more, though his contemporaries valued him at his true worth, but in compensation for the neglect his pieces are now among the most costly works of art whenever they turn up at public {90} sales. While devoting himself to the new artistic modes, he accepted commissions in both bronze and marble for the embellishment of Florence, and the bronze doors of the sacristy of the Duomo are his, as well as certain reliefs in marble on the Campanile.