Ever notice the (ahem...) rather "adult" oriented couple along the boarder of the Beaux Tapestry....
Yeah, you can find a lot of graphic, violent, racy, and outright pornographic stuff. Hieronymous Bosch's paintings take the cake in my book for information density, but
Les Tres Riches Heures -- a religious prayer book -- has stuff then considered rather innocuous that would never be seen these days.
The Birth of Venus (so-called "Venus on a Half-Shell") is mild. <img src="/forum/images/icons/blush.gif" alt="" />
Also note on the ARMA site the various extracts of manuscripts. There's a lot of graphic stuff there; very interesting, though.