The Art of Courtly Love is an essay written by the 12th-century scholar Andreas Capellanus. Styled after a scholastic philosophic argument, it describes what love is, how one may obtain it, its value to society, and its drawbacks. Its most famous section is its 31 "Rules of Love", which are supposed to describe the proper behavior of people in love. Sounds simple enough, right? In other words? He did exactly what we are doing. This is one of the oldest Books on Trope, surpassed only by Aristotle.