Albrecht Dürer - German painter, engraver and art theorist, one of the first artists who introduced classical motifs into the art of the Northern Renaissance. Dürer's work largely determined the nature of German art at the end of the 15th and first half of the 16th century. The German master was a key figure in his era, which is confirmed not only by his paintings, but also by treatises outlining his views in mathematics and descriptive geometry.