12th century illuminated medieval encyclopedia compiled by Herrad of Landsberg
The Hortus deliciarum (Latin for Garden of Delights) was a medieval manuscript compiled by Herrad of Landsberg at the Hohenburg Abbey in Alsace, better known today as Mont Sainte-Odile. . Description. The Hortus deliciarum is one of the first sources of polyphony originating from a convent. The manuscript contained at least 20 song texts, all of which were originally notated with music. Those that can be recognized now are from the conductus repertory, and are mainly note against note in texture. The notation was in semi-quadratic neumes with pairs of four-line staves.
https://en.wikipedia.org/wiki/Hortus_deliciarum