- Arrighi family1
- Arte della lana (Guild : Florence, Italy)1
- Assumption of the Blessed Virgin Mary1
- Astronomy, Greek1
- Athīr al-Dīn al-Abharī, al-Mufaḍḍal ibn ʻUmar, d. 1265. Hidāyat al-ḥikmah1
- Avicenna, 980-1037. Qaṣīdah fī al-nafs1
- Avodah (Yom Kippur liturgy)1
- Avraham ben Yosef Ḥasan, min Ṭaledo1
- Ayyubids1
- Baldi, Filippo1
- Banks and banking1
- Baptism--Catholic Church1
- Barberino, Bardo da1
- Bardi, Caterina de'1
- Bardi, Giovanni de', conte di Vernio, 1534-16121
- Bardi, Marco de'1
- Baronto, Francesca di1
- Baronto, Taddeo di1
- Baronto, Ventura di1
- Barontolo, Barontolo di1