Agostino Gadaldini’s Latin translation of Galen’s Ad Glauconem and of Stephanus’ commentary upon it, enhanced with his own scholia. The work was at the heart of the medical curriculum at Alexandria, and the sixth/seventh-century Alexandrian physician Stephanus naturally made it the subject of a commentary (his commentaries on the Prognostics and Aphorisms of Hippocrates also survive). Gadaldini of Modena produced this Latin edition from a Greek manuscript now in the Royal Library of Copenhagen. This was the first printed edition of any work by Stephanus of Athens.