Parentless Concepts
- Altenburg-Bleck
- Althann
- Amama, Sixstinus
- America
- Amsterdam
- Analus, Isaac
- Anastasius Sinaita
- Andreas of Ratisbon
- Andreas of Regensburg, Chronicon de principibus terrae Bavarorum
- Angermaria, Elisabetha
- attachment
- animation
- anime
- annotation
- Anna Comnena
- Anna Comnena, Alexiados Libri VIII. ab Anna Comnena de rebvs a patre gestis scripti, nunc primum a Dauide Hoeschelio editi
- Anna Juditha
- Anniversary Fund of the Oesterreichische Nationalbank
- annual report
- Anselm of Lucca
- Anthony Günther
- Antonides, Johannes
- Antonio Bonfini, Rerum Hungaricarum Decades
- Antonio de Herrera y Tordesillas, Istoria general de las Indias