I thought you all might be interested in this:
We were talking about ratios and the number φ (phi), the Golden Ratio, last week. We also talked about how deeply it's tied to our unconscious appreciation of things that are beautiful. I came across this 7 minute video (below) that tells something of the story behind the construction of The Parthenon. You can also read on wikipedia about how φ was integrated into it's design. You can also browse this site which is dedicated to exploring all things about the Golden Ratio.