However , in 1513 and 1514 Dürer created his three most famous engravings : Knight , Death , and the Devil ( 1513 , probably based on Erasmus 's treatise Enchiridion militis Christiani ) , St. Jerome in his Study , and the much-debated Melencolia I ( both 1514 ) .
In 1513 and 1514 he created his three most famous engravings , The Knight , Death , and the Devil ( or simply , The Knight , as he called it , 1513 ) , Melencolia I , and St. Jerome in his Study ( both 1514 ) .