Constantine IX Monomachos
He revised Psellos's ' (Latin "Syntagma de alimentorum facultatibus" or "De cibarium facultate", "On the Properties of Foods"), which criticizes Galen and emphasizes eastern medical traditions. Paul Moore says "the text is really an explanation of Aetius Amidenus "Iatricorum libri xvi", with material drawn from Dioscorides "Liber de alimentis". Apparently, Psellos wrote the work for the emperor Constantine IX Monomachos. It was then revised for Michael VII Doukas by Symeon Seth, who wrote a brief introduction (the proem.), made some corrections in the text, omitting some chapters. The work deals with some two hundred and twenty-eight plants and animals." The "Syntagma" is an important source for Byzantine cuisine and dietetics.