The Aventine was a significant site in Roman mythology. In Virgil's Aeneid, a cave on the Aventine's rocky slope next the river is home to the monstrous Cacus, killed by Hercules for stealing Geryon's cattle.[4] In Rome's founding myth, the divinely fathered twins Romulus and Remus hold a contest of augury, whose outcome determines the right to found, name and lead a new city, and to determine its site. In most versions of the story, Remus sets up his augural tent on the Aventine; Romulus sets his up on the Palatine.[5]