Nicephorus, and George Syncellus, and made a collection of documents concerning the affairs of Pope Honorius I. Several important letters written by him have been preserved. The Liber Pontificalis, which was formerly ascribed to him, was not written by him; he seems to have shared in the revision of the Life of Nicholas I. See also Papal selection before 1059 Notes This article incorporates text from the 1913 Catholic Encyclopedia article "Anastasius Bibliothecarius" by J.P. Kirsch, a publication now in the public domain. External links Opera Omnia by Migne Patrologia Latina with analytical indexes Year of birth uncertain Year of death uncertain 810s births 870s deaths 9th-century antipopes 9th-century Christian clergy Antipopes 9th-century Latin writers Greek–Latin translators Italian librarians People excommunicated by the Catholic Church People of medieval Rome 9th-century Italian historians 9th-century translators