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.