In the older literature, the prevailing view was that Plato's lecture took place at the end of Plato's life.
Those historians of philosophy who date the lecture to a later time have proposed several different possible periods: between 359/355 (Karl-Heinz Ilting),[REF] between 360/358 (Hermann Schmitz),[REF] around 352 (Detlef Thiel),[REF] and the time between the death of Dion(354) and Plato's own death (348/347: Konrad Gaiser).