Immo WarntjesImmo Warntjes is a graduate of the University of Gottingen (Germany) in history and mathematics. From 2003 to 2006 he was a post-graduate fellow in the Foundations of Irish Culture, 600-850 AD-project in the Moore Institute of NUI Galway (Ireland), were he completed his PhD under the supervision of Prof. Daibhi O Croinin in 2007. Since 2007 he is lecturer in Medieval History at the University of Greifswald (Germany). Besides late-antique and early-medieval computistics, his main areas of research include the use of languages in early medieval Europe, Irish political history, succession to high offices, and social mobility. Read More Read Less