Robert Grosseteste

Alfred Lohr is a mathematician with many years of experience as IT-Manager in Swiss industry. Since his retirement from IBM he has completed a PhD in Latin Philology at the University of Freiburg and now specializes in the edition of medieval computus texts. His publications include Der Computus Gerlandi: Edition, Übersetzung und Erläuterungen (2013) and Opera de computo saeculi duodecimi (= Corpus Christianorum Continuatio mediaevalis, 272) (2015).C. Philipp E. Nothaft has a PhD in Modern History from the University of Munich. He has held research positions at The Hebrew University of Jerusalem, University College London, and the Warburg Institute. Since 2015, he has been Post-doctoral Research Fellow at All Souls College, Oxford. He is the author of Scandalous Error: Calendar Reform and Calendrical Astronomy in Medieval Europe (2018), Walcher of Malvern: "De lunationibus" and "De Dracone"; Study, Edition, Translation, and Commentary (2017), Medieval Latin Christian Texts on the Jewish Calendar: A Study with Five Editions and Translations (2014), and Dating the Passion: The Life of Jesus and the Emergence of Scientific Chronology (200-1600) (2012).

A critical edition of Robert Grossteste's Compotus based on the full range of available manuscripts together with a facing-page English translation. An extensive introduction and detailed commentary elucidate the work's content, purpose, and background, and highlight its significant historical role.

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