Keywords
- Agamemnon, King of Mycenae (Mythological character)1
- Agriculture--Economic aspects1
- Alfonso X, King of Castile and Leon, 1221-12841
- Animals1
- Antonio Magistri1
- Arabic poetry1
- Arbalet, Jean1
- Arithmetic1
- Armenia1
- Artedo, Petrus de1
- Artillery1
- Assumption of the Blessed Virgin Mary1
- Astrolabes1
- Astrology, Roman1
- Astronomical instruments1
- Astronomy, Medieval1
- Aubertus, de Galardone1
- Augustine, of Hippo, Saint, 354-4301
- Augustinians1
- Barberino, Bardo da1