- Arabic language1
- Arabic language--Foreign words and phrases1
- Arabic language--Pronunciation1
- Arabic language--Rhyme1
- Arabic language--Semantics1
- Arabic language--Versification1
- Arabic philology1
- Aragon (Spain). Cortes1
- Arianism1
- Ark of the Covenant1
- Armenia1
- Armies1
- Armorial bindings1
- Arnaldus, de Villanova, -13111
- Arte della lana (Guild : Florence, Italy)1
- Asher Yeshaʻy., a.b.d. ḳ. Ropshits1
- Asia1
- Astronomy, Medieval1
- Augustine, of Hippo, Saint, 354-4301
- Aurispa, Giovanni, approximately 1376-14591