John F. Haldon FBA (23 October 1948 in Newcastle upon Tyne) is a British historian, and Shelby Cullom Davis '30 Professor of European History emeritus, professor of Byzantine history and Hellenic Studies emeritus, as well as former director of the Mossavar-Rahmani Center for Iran and Persian Gulf Studies at Princeton University. Early life and education Haldon is from Newcastle upon Tyne, UK. He received his bachelor's degree from the University of Birmingham, United Kingdom, his master's degree from Ludwig Maximilian University of Munich, Germany, and his PhD from the University of Birmingham, in the UK. Haldon also studied Modern Greek at the University of Athens. He initially wanted to study Roman-British history and work on post-Roman Britain, but eventually changed his field of study. Career From 1980 to 1995, he was junior professor at the University of Birmingham. From 1995 to 2000, he was director of the Centre for Byzantine, Ottoman and Modern Greek Studies at the University of Birmingham. From 2000 to 2005, Haldon served as head of the School of Historical Studies at the University of Birmingham. He was a senior fellow at the Dumbarton Oaks Center for Byzantine Studies, Washington, D.C., from 2007 to 2013 and was professor of Byzantine history and Hellenic studies at Princeton University since from 2005 to 2018. Haldon also served as the Shelby Cullom Davis Professor of European History at Princeton since 2009 and the director of graduate studies for the Princeton History Department from 2009 to 2018. From 2013 to 2018 he was founding director of the Mossavar-Rahmani Center for Iran and Persian Gulf Studies. From 2013 he has been director of the Princeton Climate Change and History Research Initiative, and since 2018 director of the Environmental History Lab for the Program i Medieval Studies. He is the author and co-author of over 25 books, including The De Thematibus (‘on the themes’) of Constantine VII Porphyrogenitus. Translated with introductory chapters and detailed notes,The empire that would not die: The paradox of eastern Roman survival, 640 – 740, A tale of two saints: the passions and miracles of Sts Theodore 'the recruit' and 'the general''', A Critical Commentary on the Taktika of Leo VI and Byzantium in the Iconoclast Era: A History, with Leslie Brubaker. His research focuses on the history of the medieval eastern Roman (Byzantine) empire, in particular in the period from the seventh to the twelfth centuries; on state