The Etruscans had a written language, and they must have had some kind of literature. Wikipedia gives a short mention. What is the largest known piece of Etruscan literature? It could be an epic poem, a play, or anything — I don't know what kinds of things they had.
There is very little extant Etruscan text. What I am looking for does not have to be extant, but just believed to have existed. My question can be rephrased like so: What is the most significant item in Etruscan literature that we have indirect evidence of?