Martyrology of Usuard
Usuard was a Benedictine monk of the Abbey of Saint-Germain-des-Prés, Paris. He seems to have died about the year 875, and the prologue in which he offers to Charles the Bald his most important work, the Martyrology, which he had undertaken at that monarch's instigation, was apparently written very shortly before the author's death.
Usuard was a prominent member of his order and he had been sent on a mission to Spain in 858 to procure certain important relics, of which journey an account is still preserved. The Martyrologium which bears his name, a compilation upon which the Roman Martyrology depends very closely, remained throughout the Middle Ages the most famous document of its kind. It is preserved to us in innumerable manuscripts, of which Henri Quentin gives a partial list (Martyrologes historiques, 1908, pp. 675–7).
The full story of the relation of the texts was unravelled for the first time by Quentin, and the evolution of the early medieval martyrologia culminating in Usuard's work was told by Quentin in the book just cited. Usuard provided what was substantially an abridgement of Ado's Martyrology in a form better adapted for practical liturgical use. In certain points, however, Usuard reverted to a Lyonese recension of Bede's augmented Martyrology, which was attributed to the archdeacon Florus of Lyon.
The text of Usuard's Martyrologium was edited by Jacques Bouillart (Paris, 1718) from manuscript Latisi 13745 at Paris, which, if not the autograph of the author, dates at any rate from his time. A still more elaborate edition was brought out by the Bollandist Père Jean-Baptiste Du Sollier.