In 2009 the Seventh International Conference of Manichaean Studies was held at the Chester Beatty Library in Dublin. The 22 selected papers of this volume offer a deep insight into the faith of Manichaean communities ranging from the very beginning of the 3rd century up to the last traces of worship today. Among others the authors deal with sources from Augustin, John the Grammarian, Ephrem the Syrian and further sources written in Coptic, Sogdian, Middle Persian, Parthian and Chinese. Several studies about Manichaean art and iconography offer a visual impression, which gives a new opportunity for understanding the religion of Light.