Oliver Byrne's edition of Euclid
sunsite.ubc.ca
sunsite.ubc.ca
To my delight, I noticed that Taschen has republished this wonderful edition, so I ordered it from Amazon and I'm now awaiting delivery so I can peruse it, enjoy it, and keep it for my children's future math education:
http://www.amazon.com/Six-Books-Euclid-Werner-Oechslin/dp/38...
See for example spreads, etc: http://www.taschen.com/pages/en/catalogue/classics/all/06724...
Actually, on closer inspection the download is missing many of the larger diagrams completely for some reason, while others are rendered without color.
Compare, side by site
http://sunsite.ubc.ca/DigitalMathArchive/Euclid/bookI/images...
and the drab
http://aleph0.clarku.edu/~djoyce/java/elements/bookI/propI1....