This volume is the second part of a collection of core works by Matthias Baltes. The main part contains more recent essays on ancient philosophy, in particular on Plato and Platonism, as well as on Epicurus, some of which are published here for the very first time. A smaller section contains earlier works on Homeric poetry. Both collections offer an almost complete overview of the research work carried out by Matthias Baltes, above all of the area that he has focused on intensively during the course of his life: the history of thought phenomena and Platonism. In addition to discussing individual philological questions, he also turns his attention to the wide-ranging philosophical and theological aspects of this world of ideas, important both in ancient and modern times.