Keywords
- Ardinghelli, Rinaldo degli1
- Aringhello, Tommaso di1
- Arithmetic--Study and teaching1
- Armaiolo, Puccino1
- Armaleoni, Benedetto degli1
- Armies1
- Armorial bindings1
- Arnaldus, de Villanova, -13111
- Arrighi family1
- Arrigo, Simone d'1
- Arrigucci family1
- Arrigucci, Caterina1
- Arrigucci, Luigi1
- Asceticism--Early church1
- Assumption of the Blessed Virgin Mary1
- Astrology, Arab1
- Astronomical instruments1
- Astronomy, Arab1
- Astronomy, Greek1
- Attila, -4531