The present volume contains the proceedings of an international colloquium held in February 2015 at the Arts Faculty of the KU Leuven that brought together specialists in (late) ancient philosophy and early Christian studies. Contributors were asked to reflect on the reception of two foundational texts dealing with the origin of the world - the third book of Plato's Timaeus and the Genesis account of the creation. The organizers had a double aim: They wished to offer a forum for furthering the dialogue between colleagues working in these respective fields and to do this by studying in a comparative perspective both a crucial topic shared by these traditions and the literary genres through which this topic was developed and transmitted. The two reference texts have been studied in antiquity in a selective way, through citations and essays dealing with specific issues, and in a more systematic way through commentaries.The book is divided into three parts. The first one deals with the so-called Middle- and Neoplatonic tradition. The second part is dedicated to the Christian tradition and contains papers on several of the more important Christian authors who dealt with the Hexaemeron. The third part is entitled "Some Other Voices" and deals with authors and movements that combine elements from various traditions. Special attention is given to the nature and dynamics of the often close relationship between the various traditions as envisaged by Jewish-Christian authors and to the remarkable lack of interest from the Neoplatonists for "the other side".