Oliver Byrne's 1847 illustrated edition of the First Six Books of the Elements of Euclid

 Oliver Byrne's Euclid is a beautiful visual and colour-based reprinting of Euclid's Elements (the geometry sections) set up with mostly visual elements and a minimum of words.

You might want to look at this online version of the whole book!

(Here's another link to a UBC Math Department site with Byrne's book as well.)