This is an edition of the Greek text with commentary of three speeches by Dio of Prusa (Dio Chrysostom) which are particulary important for the intellectual history of the Greco-Roman world. They are full of colorful narrative, myth and satire. While "Euboicus" (VII) is well known for its pastoral episodes of Dio's visit to the isolated community of hunters, "Olympicus" (XII) is an important document in the history of aesthetics, and "Borystheniticus" (XXXVI) gives a glimpse of a remote city in Southern Russia. These speeches have never been the subject of a commentary in English.