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Ralph-Johannes Lilie (30 December 1947, Hamburg) is a GermanByzantinist.

He graduated fromMunich University in 1975 with a dissertation entitled 'The Byzantine Reaction to the Arab Invasions – Studies on the Transformation of Government Structures in the Byzantine States in the 7th and 8th Century' andhabilitated in 1982–83 at the Byzantinisch-Neugriechischen Seminar of theFree University of Berlin, where from 1984 to 2005 he was extraordinary professor. Since 1992 he has been working on theProsopographie der mittelbyzantinischen Zeit (PmbZ) project at theBerlin-Brandenburg Academy of Sciences and Humanities. His wife is the medievalistMarie-Luise Favreau-Lilie.

• Die byzantinische Reaktion auf die Ausbreitung der Araber. Studien zur Strukturwandlung des byzantinischen Staates im 7. und 8. Jahrhundert. Institut für Byzantinistik und Neugriechische Philologie der Universität München 1976.
• Byzanz. Kaiser und Reich. Böhlau, Köln-Weimar-Wien 1994,ISBN 3-412-00394-8.
• Byzanz. Das zweite Rom. Siedler, Berlin 2003,ISBN 3-88680-693-6.
• Byzanz und die Kreuzzüge.Kohlhammer Verlag, Stuttgart 2004,ISBN 3-17-017033-3.
• Byzanz: Geschichte des oströmischen Reiches 326–1453. 5. durchgesehene Auflage, Beck München 2010 (Beck'sche Reihe Wissen),ISBN 978-3-406-41885-3.
• Einführung in die byzantinische Geschichte. Kohlhammer Verlag, Stuttgart 2007,ISBN 978-3-17-018840-2.

• Literature by and about Ralph-Johannes Lilie in theGerman National Library catalogue

• Living people
• Writers from Hamburg
• 1947 births
• Ludwig Maximilian University of Munich alumni
• Academic staff of the Free University of Berlin
• German Byzantinists
• Scholars of Byzantine history

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• Short description matches Wikidata
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• BLP articles lacking sources from March 2017
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