In the 15th and first half of the 16th centuries, one workshop more than any other dominated the production of Madonnas. They were the della Robbia family, and they were not painters but modellers in clay. Luca della Robbia, famous for his "cantoria gallery" at the cathedral, was the first sculptor to use glazed terracotta for large sculptures. Many of the durable works of this family have survived. The skill of the della Robbias, particularly Andrea della Robbia, was to give great naturalism to the babies that they modelled as Jesus, and expressions of great piety and sweetness to the Madonna. They were to set a standard to be emulated by other artists of Florence.