Venet's arcs and diagrams

I first saw Bernar Venet's mathematical sculpture quite a few years ago in Quebec City.  It was his signature bundle of arcs like the ones I saw at Universitaet Mozarteum, Salzburg last year:

Then I discovered his very unique wall paintings in a mathematical journal when I was studying homological algebra at graduate school.  I love the way he brought two of my favourite things, art and mathematics, together unpretentiously.

Image from http://www2.math.uni-paderborn.de/