User:SydneyDale/sandbox
From Wikipedia, the free encyclopedia
The Magnus Liber or Magnus liber organi (English translation: Great Book of Organum), written in Latin, was a repertory of medieval music known as organum. This collection of organum survives today in three major manuscripts. This repertoire was in use by the Notre-Dame school composers working in Paris around the end of the twelfth and beginning of the thirteenth centuries, though it is well agreed upon by scholars that Leonin contributed a bulk of the organum in the repertoire. This large body of repertoire is known from references to a "magnum volumen" by Johannes de Garlandia and to a "Magnus liber organi de graduali et antiphonario pro servitio divino" by the English music theorist known as Anonymous IV[3][4]. Today it is known only from later manuscripts containing compositions named in Anonymous IV's description. The Magnus Liber is regarded as one of the earliest collections of polyphony.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/5/5f/Magnus_Liber_Organi.jpg/640px-Magnus_Liber_Organi.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/7/74/Magnus_Liber_OrganiFC.png/640px-Magnus_Liber_OrganiFC.png)