Favorite artwork of all time

What are your favorite artworks of all time, preferably one of each: game, doujin, picture.

Here are mine:

Game: Robo (The gameplay is the important factor here, there is a sense of accomplishment. I would recommend not using the guide provided in the file.)

Link to the game: http://www.mediafire.com/?78ugyrey8hyow54

Doujin: Mama's Terrible Soup (No comment really, overall great doujin. Includes most of my simpleton fetishes)

Link to the doujin: http://www.hentairules.net/gal/_2013/drill_jill_mamas_terrible_soup.html

Picture: (I know it sounds like I am a terrible person but the main reason I like it is because it really reminds me of my own mother)

Link to the picture: http://g.e-hentai.org/s/37428b2d02/513957-204