Ruthy Gertwagen Tonnes Bekker-Nielsen is Senior Lecturer in Ancient History at the University of Southern Denmark. His fields of research include the historical geography of the ancient world, the history of the Black Sea region and Roman historiography. Ruthy Gertwgen is Senior Lecturer in Byzantine and Modern Hellenic Studies at the University of Haifa, Israel. Her research includes Mediterranean maritime history and underwater archaeology in the Byzantine, Medieval and Early Modern periods. Read More Read Less