Aristotle's Poetics (Greek: Περὶ ποιητικῆς, Latin: De Poetica; c. 335 BCE) is the earliest surviving work of dramatic theory and the first extant philosophical treatise to focus on literary theory. At least this has been the traditional view for centuries. However, recent work is now challenging whether Aristotle focusses on literary theory per se (given that not one poem exists in the treatise) or whether he focusses instead on dramatic musical theory that only has language as one of the elements.