Artisans such as engravers became more concerned with aesthetics rather than just perfecting their crafts. Germany had master engravers, such as Martin Schongauer, who did metal engravings in the late 1400s. Gardner relates this mastery of the graphic arts to advances in printing which occurred in Germany, and says that metal engraving began to replace the woodcut during the Renaissance. However, some artists, such as Albrecht Dürer, continued to do woodcuts. Both Gardner and Russell describe the fine quality of Dürer's woodcuts, with Russell stating in "The World of Dürer" that Dürer "elevated them into high works of art."