The papyri transmit a part of the testimonia relevant to pre-Socratic philosophy. The Corpus dei Papiri Filosofici takes this material only partly into account. In this volume, a team of specialists discusses some of the most important papyrological texts that are major instruments for reconstructing pre-Socratic philosophy and doxography. Furthermore, these texts help to increase our knowledge of how pre-Socratic thought through contributions to physics, cosmology, ethics, ontology, theology, anthropology, hermeneutics, and aesthetics paved the way for the canonic scientific fields of European culture. More specifically, each paper tackles (published and unpublished) papyrological texts concerning the Orphics, the Milesians, Heraclitus, Empedocles, Anaxagoras, the early Atomists, and the Sophists. For the first time in the field of pre-Socratics studies, several papers are devoted to the Herculanean sources, along with others concerning the Graeco-Egyptian papyri and the Derveni Papyrus.