- Emeritus Professor of Medieval Latin Literature, University of Cambridge
- Emeritus Professor, University of Cambridge, 2001
- Professor of Medieval Latin Literature, University of Cambridge, 1989 - 2001
- Fellow, Clare Hall, University of Cambridge, 1964 - 2001
The medieval & Renaissance literature & history of Spain from 1200 to 1700, with special interests in literacy, libraries & the history of ideas; humanism; imperialism
The Holy Roman Empire in its European context from the fifteenth century to 1806; the legacy of the Holy Roman Empire in German-speaking central Europe from 1806 to the present
History and culture of Russia & Eastern Europe, Medieval & Early Modern; cultural and social history of information technologies
Renaissance philosophy, particularly the Platonism of Marsilio Ficino & Pica della Mirandola; Renaissance poetry, magic, mythology, iconography & hermeneutics; Chaucer, Spenser, Shakespeare.