- Ark of the Covenant1
- Armorial bindings1
- Armorial stamps1
- Arrighi family1
- Arte della lana (Guild : Florence, Italy)1
- Astrology, Arab1
- Astronomy, Greek1
- Avodah (Yom Kippur liturgy)1
- Avraham ben Yosef Ḥasan, min Ṭaledo1
- Ayyubids1
- Banks and banking1
- Baptism--Catholic Church1
- Barberino, Bardo da1
- Bardi, Giovanni de', conte di Vernio, 1534-16121
- Baronto, Francesca di1
- Baronto, Taddeo di1
- Baronto, Ventura di1
- Barontolo, Barontolo di1
- Bartholomew, of San Concordio, 1262-13471
- Baʻal ha-Maʼor (Gerondi, Zerahiah ben Isaac, ha-Levi)1