Source London, British Library (GB-Lbl) : Harley 3019, fol. 56v Contenu Sancte Bonifati martyr Chant similaire : Sancte Vite martyr inclyte (Vorau, Stiftsbibliothek (A-VOR), 287, fol. 291r) Ressources Diamm Giovanni Varelli, Two newly discovered tenth-century Organa University of Cambridge, Earliest known piece of polyphonic music discovered