George Hamartolos

George Hamartolos or Hamartolus (Greek: Γεώργιος Ἁμαρτωλός) was a monk at Constantinople under Michael III (842–867) and the author of a chronicle of some importance. Hamartolus is not his name but the epithet he gives to himself in the title of his work: "A compendious chronicle from various chroniclers and interpreters, gathered together and arranged by George, a sinner (ὐπὸ Γεωργίου ἁμαρτωλοῦ)". It is a common form among Byzantine monks. German 19th century scholar Karl Krumbacher (Byz. Litt., 358) protested against the use of this epithet as a name and proposed (and used) the form Georgios Monachos (Γεώργιος Μοναχός "George the Monk").

Nothing is known about him except from the internal evidence of his work, which establishes his period (in the preface he speaks of Michael III as the reigning emperor) and his calling (he refers to himself several times as a monk).