Suggestions for topics in a public talk about art and mathematics I've been giving a public talk about Art and Mathematics for a few years now as part of my University's outreach program. Audience members are usually well-educated but may not have much knowledge of math. I've been concentrating on explaining Richard Taylor's analysis of Jackson Pollock's work using fractal dimension, but I'm looking to revise the talk, and wonder if anyone has some good ideas about what might go in it. M.C. Escher and Helaman Ferguson's work are some obvious possibilities, but I'd like to hear other ideas.
Edit: I'd like to thank the community for their suggestions, and report back that Kaplan and Bosch's TSP art was a real crowd pleaser. The audience was fascinated by the idea that the Mona Lisa picture was traced out by a single intricate line. I also mentioned Tony Robbin and George Hart, which were well-received as well.

I heard Thomas Banchoff give a nice talk about Salvador Dali's work a few years ago.  Apparently they were even friends.  
Here's a link to a lecture by Banchoff on Dali.
It looks like Banchoff wrote a paper in Spanish Catalan on Dali, too: 
"La Quarta Dimensio i Salvador Dali,"  Breu Viatge al mon de la Mathematica, 1 (1984), pp. 19-24. 
Even with my poor Spanish nonexistent Catalan skills I can translate the title as "The Fourth Dimension and (or "in"?) Salvador Dali." :)
