The Double Heroides are a set of six epistolary poems allegedly composed by Ovid in Latin elegiac couplets, following the fifteen poems of his Heroides, and numbered 16 to 21 in modern scholarly editions. These six poems present three separate exchanges of paired epistles: one each from a heroic lover from Greek or Roman mythology to his absent beloved, and one from the heroine in return. Ovid's authorship is uncertain.