Geoffrey Greatrex is a professor of Classics at the University of Ottawa, where he has taught since 2001. He studied at Exeter College, Oxford, where he received his doctorate in later Roman history in 1994. He then worked at several universities, such as the Open University (England), Cardiff (Wales), Dalhousie (Halifax, Nova Scotia) and Ottawa. He has written extensively on the later Roman empire, in particular on the reign of Justinian: he is the co-author of The Chronicle of Pseudo-Zachariah Rhetor: Church and War in Late Antiquity (Liverpool, 2011) and a sub-editor for the Encyclopedia of the Roman Army (Oxford, 2014). He was awarded a Humboldt fellowship to conduct his research at Munich in 2006 and 2009 and was a visiting fellow at Robinson College, Cambridge, in 2009 and 2013-14. From April to June 2025, Mr Greatrex is conducting his research at the Department of Byzantine and Modern Greek Studies, University of Cologne, as a Humboldt Fellow.

• Das Zeitalter Iustinians
• Beziehungen zwischen Römern und Persern in der Spätantike
• Historiographie in der Spätantike, besonders Prokop von Cäsarea

• Übersetzung (mit kurzem Kommentar) der Perserkriege ins Esperanto
• Aufsätze zur Prokop-Forschung seit 2014 und zu Malalas und der Geschichtsschreibung im 6. Jahrhundert
• Spätantike: Bedeutung des Begriffs, seine Verwendung und ihr Wandel im Laufe der Jahrzehnte

Procope. Guerres contre les Perses, Guerres de Justinien (Livres I et II) mit Janick Auberger, eine französische Übersetzung mit kurzem Kommentar,  Paris : Les Belles Lettres, 2022.

Procopius of Caesarea. The Persian Wars, a translation with introduction and notes, Cambridge : Cambridge University Press, 2022.

Procopius of Caesarea. The Persian Wars. A Historical Commentary, Cambridge : Cambridge University Press, 2022.

A History of the Later Roman Empire (dritte Auflage), mit Stephen Mitchell, Hoboken, NJ: Wiley-Blackwell, 2023.