Dr Zisis Melissakis is Senior Researcher at the Institute of Historical Research (Section of Byzantine Research) of the National Hellenic Research Foundation. His research focuses mainly on monastic libraries, particularly Mount Athos and Patmos through palaeographical, codicological, as well as historical and archival topics. His current principal work concern the cataloguing of the manuscripts of the Monastery of St John the Theologian on Patmos, as well as the manuscripts and old printed books of the Monastery of Iviron on Mount Athos. He has participated in a number of Greek and International research projects on the Byzantine and post-Byzantine manuscript book. Since 2002 he has been teaching Greek Palaeography at the Historical Sciences Seminars of the National Hellenic Research Foundation and has delivered lectures on the same topic in various Greek universities. During the past few years, he has organized two international summer schools on Greek Palaeography and Byzantine Epigraphy for the National Hellenic Research Foundation at the Monastery of Patmos.