Alexandros Tsakos studied history and archaeology at the University of Ioannina, Greece. His Master thesis was written on ancient polytheisms and submitted to the Université Libre, Belgium, in 1998. He studied Coptic at the University of Bergen, Norway, in 2008. From 2000 to 2002 he worked for the Antiquities Service in Attiki, Greece. Since 2003, he has worked as an archaeologist in Sudan in the frame of the Merowe Dam Archaeological Salvage Project, at Jebel Barkal, and at Akkad. Alexandros organized the Greek Cultural Center “Ergamenis” in Khartoum. He has led the renovation of the Museum at Jebel Barkal, and he was the contractor of UNESCO for the rehabilitation of the Permanent Exhibition of Medieval Antiquities in the Sudan National Museum. In 2007 and 2008, Alexandros worked extensively on the medieval collection stored in the Sudan National Museum. He has published several articles on Medieval inscriptions from Nubia – the latest concerns the Christian inscriptions from Sai, one of the largest islands on the Nile where he directs the Medieval Sai Project as part of the French Mission on Sai Island directed by Vincent Francigny. Alexandros defended his Ph.D. thesis at Humboldt University, Berlin in February 2013. The title is “The Greek Manuscripts on Parchment Discovered at Site SR022.A in the Fourth Cataract Region, North Sudan”. He is currently a postdoctoral researcher at the University of Bergen with a project on “Religious Literacy in Christian Nubia”. Apart from the material from Sur Island, the data basis for his current research consists of the textual record discovered at the sites of Qasr el Wizz and Serra East (to be published in the Oriental Institute of Chicago Nubian Expedition monograph series, vol. 15), Serra East (to be published in the Oriental Institute of Chicago Nubian Expedition monograph series, vol. 13), and Attiri Island (to be published as a monograph in the journal Dotawo).