I Modi.

I Modi (The Ways) also known as The Sixteen Pleasures or under the Latin title De omnibus Veneris Schematibus, is a famous, essentially lost erotic book of the Italian Renaissance


and were based on sixteen images of sexual positions (Aretino's Postures). Aretino then composed sixteen explicit sonnets to accompany the paintings/engravings.

In some meaning it was first european Kama-Sutra.

Some more about it (it's really interesting, u know): http://en.wikipedia.org/wiki/I_Modi