Durer was a German painter, engraver, printmaker and mathematician from Nuremberg. His high-quality woodcuts gave him a great reputation and he has been regarded as the greatest artist of the Northern Renaissance. His vast body of work includes altarpieces, religious works, numerous portraits and self-portraits, and copper engravings. The woodcuts, like the Apocalypse series (1498). His well-known prints include the Knight, Death, and the Devil (1513), Saint Jerome in his Study (1514) and Melencolia I (1514), which has been the subject of much analysis and interpretation. His watercolors also mark him as one of the first European landscape artists.Dürer's introduction of classical themes into Northern art, through his knowledge of Italian artists and German humanists, has secured his reputation as one of the most important figures of the Northern Renaissance. This is reinforced by his theories which involve principles of mathematics, perspective and ideal proportions.