The author analyzes the Euripidean tragedy Ion. In this article an attempt was made to explain some important elements, such as the date, when the play could have been staged, and political situation of Athens in that time. Essential question were mythical innovations in this tragedy. The author looks for sources of these innovations and their influence on propaganda meaning of Ion. Regarding the problem of date, when the tragedy was staged, there were additionally made some methodological remarks. Very helpful in that chapter were auxiliary sources, such as another literary sources and epigraphical sources.