Initial M with St. Benedict of Nursia receiving the Rule and giving it St. Romuald and his friars
These leaves can be dated to ca. 1270-80.
This initial begins the first response of the first nocturn of Matins for the feast of St. Benedict (Mar. 21), "Mundum vocans ad agni nuptias ..." (Calling the world to the marriage of the Lamb). The rule of St. Benedict is the set of instructions and teachings on leading the monastic life that became the foundational text of Western monasticism.