At Karl Ernst Osthaus-Museum, November, (2000-March, 2001), see
For good photos of model, see http://www.mohr-i.nl/content.phtml?793
At Edinburgh Festival, Edinburgh, Scotland, (2004), see http://www.ed.ac.uk/news/circular.html
The Perceptual Observer is a timeline devoted to perceptually or optically based art. Comments may be sent to q2222@earthlink.net.