Were Ovid’s Heroides inspired by the contemporary practice in oratory at schools? The similarity of the poems to the rhetorical exercise ethopoeia has made scholars believe so for many centuries. However, there are very few studies into the matter, and the comparison has been controversial. In this thesis, the author explores the concept of ethopoeia, arguing that it needs to be reassessed and that the term can be successfully applied to Ovid’s famous poems. This discovery provides new perspectives on ancient literary composition and the influence of rhetorical training on the Heroides.