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Antipope Anastasius | |
|---|---|
| Papacy began | c. 17 July 855 |
| Papacy ended | c. 29 September 855 |
| Predecessor | Roman claimant: Leo IV Antipapal claimant: John VIII |
| Successor | Roman claimant: Benedict III Antipapal claimant: Christopher |
| Other post(s) | Abbot of Santa Maria in Trastevere Bibliothecarius of the Roman Catholic Church |
| Personal details | |
| Born | c. 810 |
| Died | c. 878 |
Anastasius Bibliothecarius (c. 810 – c. 878) was the librarian (bibliothecarius) and chief archivist of the Church of Rome and also briefly a claimant to the Papacy.