Résumé :
This chapter focuses on four Byzantine orthographical canons attributed in late Greek manuscripts to Maximos Mazaris, Galaktion, or Theodoros Ptochoprodromos. Although their existence has been noted in scholarly literature, three of these “parahymnographical” didactic works remain unpublished and virtually unknown. In order to shed light on the four canons and the tradition they represent, the paper presents their formal features and deals with their grammatical (orthographical) content and relationship to each other. Examining the extent of their manuscript tradition reveals their significant popularity as teaching materials in post-Byzantine times. The authorial attributions of the canons are discussed in depth. Some related hymnographical works is also taken into consideration.