This illustration from a fourteenth-century manuscript shows Henry of Germany delivering a lecture to university students in Bologna.

This illustration from a fourteenth-century manuscript shows Henry of Germany delivering a lecture to university students in Bologna.  
Artist: Laurentius de Voltolina; Liber ethicorum des Henricus de Alemannia; Kupferstichkabinett SMPK, Berlin/Staatliche Museen
Preussiischer Kulturbesitz, Min. 1233