The Divine Proportion (Golden Ratio)

http://en.wikipedia.org/wiki/Golden_ratio
http://www.summum.us/philosophy/phi.shtml

http://www.goldennumber.net/face/
http://www.facialbeauty.org/divineproportion.html

Video
http://www.youtube.com/watch?v=3sERcM9o25g
http://www.youtube.com/watch?v=Wy6cqVUloJQ
http://www.youtube.com/watch?v=03uC9bhX0Rc
http://www.youtube.com/watch?NR=1&feature=endscreen&v=fvdmISdytXg

Of Interest
http://en.wikipedia.org/wiki/Mathematical_beauty