Leonardo Da Vinci is the archetype of a Rennaisance man–artist, mathematician, sculptor, scientist, writer, and more. As an artist, Leonardo produced a very small sample of great work that included the Mona Lisa and the Last Supper.
Leonardo was a prolific sketcher, producing more than 13,000 pages, which are arguably his greatest legacy. Within his sketchbooks, you can find futuristic devices like a helicopter, airplane, tank, and parachutes. But, you also find some practical things, such as a movable wall to to prevent invading forces and improved bridge designs.
Here is my SxSW 2013 presentation called Design Like Da Vinci. Enjoy!
Listen to the audio at Sound Cloud: