Simplify the following text for a Grade 11 native English-speaking person.
Original: His well-known works include the Knight , Death , and the Devil ( 1513 ) , Saint Jerome in his Study ( 1514 ) and Melencolia I ( 1514 ) , which has been the subject of extensive analysis and interpretation .
Simplified: DÃ 1\/4 rer 's best known individual engravings ( that is , ones that are not part of a series ) include Knight , Death , and the Devil ( 1513 ) , Saint Jerome in his Study ( 1514 ) and Melencolia I ( 1514 ) .