the venetian artist jacopo de' barbari, whom dürer had met in venice, visited nuremberg in 1500, and dürer said that he learned much about the new developments in perspective, anatomy, and body proportions from him. de'barbari did not want to tell dürer everything he knew, so dürer began his own studies, and he kept studying for the rest of his life. this is a series of drawings show dürer's experiments in human proportion, before he made his famous engraving of "adam and eve" (1504). this is the only existing engraving signed with his full name.