Keywords
- Apollonius, of Tyana1
- Aqueducts1
- Arab countries1
- Arabic poetry1
- Arbaʻah ṭurim (Jacob ben Asher)1
- Arcibucci, Alessandro1
- Arithmetic1
- Armenia1
- Armenian Church1
- Arnaldus, de Villanova, -13111
- Arrigucci, Andrea1
- Arrigucci, Donato1
- Asceticism1
- Assassination1
- Astrology and death1
- Astronomy, Arab1
- Astronomy, Greek1
- Astronomy--Popular works1
- Astronomy--Tables1
- Auctions1