Keywords
- Arma Christi1
- Armaiolo, Puccino1
- Armaleoni, Benedetto degli1
- Arrigo, Simone d'1
- Art, Flemish1
- Astrolabes1
- Astrometeorology1
- Astronomy, Ancient1
- Astronomy, Greek1
- Astronomy, Medieval1
- Augustinians1
- Aurispa, Giovanni, approximately 1376-14591
- Austria--Lambach (Upper Austria)1
- Austrian1
- Baglioni, Niccolò1
- Bahjah al-Wardīyah (Ibn al-Wardī, Zayn al-Dīn ʻUmar ibn al-Muẓaffar)1
- Baldini, Antonio1
- Baldo, Antonio di1
- Baldo, Vestro di1
- Balducci, Domenico1