On the other hand, the graphic energy of the animals in the Paleolithic Hall of the Bulls at Lascaux fits in rather well with the vibe or urban graffiti: a shared human impulse to decorate surfaces comes to the forefront.
Is the result "art" or just an empty exercise in context? I'll let you decide...
A Note to Readers:
If you are inspired to try re-contextualizing works of art at photofunia.com, I hope you will email me some of your best efforts at firstname.lastname@example.org. I'll share some of the best ones on Facebook and Twitter.