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Dr Immo Warntjes

Staatsexamen (Göttingen), PhD (NUI)

Lecturer in Irish Medieval History
Erasmus Co-ordinator; Joint Pathway Co-ordinator - BA History and Theology

MA Medieval /Early-Modern History Co-ordinator (Sem 1)

Office: 203, 14 University Square

Telephone: +44 28 90973880



Immo Warntjes studied history and mathematics at the universities of Oldenburg (Germany), NUI Galway (Ireland), and Göttingen, graduating from Göttingen University, Germany in both subjects in 2003 (1. Staatsexamen). From 2003 to 2006, he was postgraduate researcher in the Foundations of Irish Culture Project at the National University of Ireland, Galway, where he completed his Ph.D. in 2007. In 2007, he became lecturer in Medieval History at the University of Greifswald (Germany), teaching a variety of courses on primarily Frankish, English, German, and European Medieval History, as well as Medieval Latin and Chronology. In 2012-2013, he was research fellow at the German Historical Institute (London) and the Monumenta Germaniae Historica (Munich). Immo joined Queen’s in September 2013.

Research Interests

Immo’s research falls into four categories: His primary field of interest is early medieval scientific thought; he has explored the Irish intellectual milieus of the seventh and early eighth centuries that shaped Bede’s mind and prepared the so-called Carolingian Renaissance, particularly in the field of computus (medieval time-reckoning); also, the question of continuity of late antique learning in the early middle ages is part of this research; more recently, he is involved in research on Visigothic scientifica of the sixth and seventh centuries and the transition period from Latin to Arabic science of the second half of the eleventh and the twelfth centuries. Second, the work on early medieval scientific texts prompted him to analyse the use of the vernacular in monastic teaching and intellectual debate of the time. Third, early medieval Irish history features prominently in his research, with a special interest on Irish kingship and succession, as well as the Easter controversy. Fourth, his work in Greifswald has turned his attention to cultural history in the form of central and late medieval burial practises, especially the separate burial of heart and intestines.


Selected Publications:


Edited volumes:


Early medieval scientific thought:

  • 'An Irish eclipse prediction of AD 754: the earliest in the Latin West', Peritia 24-25 (2013-14), 108-15.
  • ‘Seventh-century Ireland: the cradle of medieval science?’, in Mary Kelly & Charles Doherty (eds.), Music and the stars. Mathematics in medieval Ireland (Dublin 2013), 44–72.
  • ‘Köln als naturwissenschaftliches Zentrum in der Karolingerzeit: Die frühmittelalterliche Kölner Schule und der Beginn der fränkischen Komputistik’, in Heinz Finger & Harald Horst (eds.), Mittelalterliche Handschriften der Kölner Dombibliothek. Viertes Symposion der Diözesan- und Dombibliothek Köln zu den Dom-Manuskripten (26. bis 27. November 2010) (Köln 2012), 41–96.
  • ‘The Computus Cottonianus of AD 689: a computistical formulary written for Willibrord’s Frisian mission’, in Immo Warntjes & Dáibhí Ó Cróinín (eds.), The Easter Controversy of Late Antiquity and the Early Middle Ages. Proceedings of the 2nd International Conference on the Science of Computus in Ireland and Europe (Turnhout 2011), 173–212.
  • ‘Irische Komputisik zwischen Isidor von Sevilla und Beda Venerabilis: Ursprung, karolingische Rezeption und Forschungsperspektiven’, Viator 42 multilingual (2011), 1–32.
  • ‘A newly discovered prologue of AD 699 to the Easter table of Victorius of Aquitaine in an unknown Sirmond manuscript’, Peritia 21 (2010), 254–83.
  • ‘The argumenta of Dionysius Exiguus and their early recensions’, in Immo Warntjes & Dáibhí Ó Cróinín (eds.), Computus and its cultural context in the Latin West, AD 300–1200. Proceedings of the 1st International Conference on the Science of Computus in Ireland and Europe (Turnhout 2010), 40–111.
  • ‘The Munich Computus and the 84 (14)-year Easter reckoning’, Proceedings of the Royal Irish Academy 107C (2007), 31–85.
  • ‘A newly discovered Irish Computus: Computus Einsidlensis’, Peritia 19-20 (2005–6), 61–4.

The use of the vernacular in the early middle ages:

  • ‘Die Verwendung der Volkssprache in frühmittelalterlichen Klosterschulen’, in Christoph Fasbender & Gesine Mierke (eds.), Wissenspaläste. Räume des Wissens in der Vormoderne (Würzburg 2013), 153–83.
  • ‘The earliest occurrence of Old English gerim and its Anglo-Irish computistical context’, Anglia 127 (2009), 91–105.
  • together with Jacopo Bisagni: ‘The early Old Irish material in the newly discovered Computus Einsidlensis (ca. AD 700)’, Ériu 58 (2008), 77–105.
  • together with Jacopo Bisagni: ‘Latin and Old Irish in the Munich Computus: A reassessment and further evidence’, Ériu 57 (2007), 1–33.

Early medieval Irish history:

  • 'Victorius vs Dionysius: The Irish Easter controversy of AD 689', in Pádraic Moran & Immo Warntjes (eds.), Early Medieval Ireland and Europe: Chronology, Contacts, Scholarship (Turnhout 2015),  33-97.
  • ‘The role of the church in early Irish regnal succession – The case of Iona’, in L’Irlanda e gli Irlandesi nell’alto medioevo (Settimane di Studio del Centro italiano di studi sull’alto medioevo, LVII) (Spoleto 2010), 155–213.
  • ‘Regnal succession in early medieval Ireland’, Journal of Medieval History 30 (2004), 377–410.
  • ‘The alternation of the kingship of Tara 734–944’, Peritia 17 (2003), 394–432.

Central and late medieval burial practices:

  • ‘Programmatic double burial (body and heart) of the European high nobility, c.1200-1400. Its origin, geography, and functions’, in Karl-Heinz Spieß & Immo Warntjes (eds.), Death at Court (Wiesbaden 2012), 197–259.

Entry on PURE research portal


HIS1003 Introducing Medieval Ireland

HIS1002 Bede and Ireland: Conversion and Ecclesiastical Power in Early Medieval Europe

HIS2047 The Expansion of Medieval Europe 1000-1300

HIS3060 Kings and Saint in Early Ireland