Artists: Leonardo
Leonardo da Vinci is remembered equally as an artist, scientist, and thinker. He frequently wrote his ideas in notebooks, complete with informative drawings and visual studies. The following websites explore his art, including his drawings and sketches:

Paintings and drawings by Leonardo
(http://www.ibiblio.org/wm/paint/auth/vinci/)

Leonardo's sketches
(http://library.thinkquest.org/3044/adv_skch.html)

Leonardo: Master Draftsman exhibition, Metropolitan Museum of Art
(http://www.metmuseum.org/special/Leonardo_Master_Draftsman/draftsman_splash.htm)

Crossing Cultures: Paper
The following websites offer a history of paper, an indispensable medium for communication and drawing.

History of paper
(http://www.paperonline.org/history/history_frame.html)

A Brief History of Paper
(http://users.stlcc.edu/nfuller/paper/)