[1] John of Saxony is quoted in various medieval manuscripts and referenced as the author of various astronomical or astrological treatises, even though his authorship in some cases is questionable.
A computus dating back to 1297 is attributed to John of Saxony even though the author is listed as Iohannes Alemanus.
Viewed with less suspicion is his commentary on Liber Introductorius ad Magisterium Idiciorum Astrorum written by al-Qabisi (Alcabitius), an Arab scholar from the late 10th century.
John of Saxony's commentary on this treatise is preserved in many manuscripts, several incunabula and old prints, the latest of which dates from the middle of the 16th century.
[1] Among his other contributions were a commentary on Alcabitius's Introduction to the art of astrology,[2] which went through eleven printed editions, and an Almanach for the years 1336 to 1380 that he computed for the meridian of Paris using the Alfonsine tables.
Under the tutelage of his master, John of Ligneres, he sought to write tables that accounted for any situation and could be put to practical use.
In 1327 he added an influential set of explanations and instructions (Canons) to the revision of the Alfonsine Tables by his master, John of Ligneres.