- Agriculture--Economic aspects2
- Alban, Saint, -304?1
- Alberto, Alberto di2
- Albertus de Fontanella1
- Albums1
- Albums (Books)1
- Alchemy7
- Alchemy--Bibliography1
- Alcuin, 735-8041
- Alcuin, 735-804. Correspondence1
- Aldobrandini, Giovanni degli1
- Alessandri, Alessandro degli1
- Alessandri, Bartolomeo degli2
- Alessandri, Niccolò degli1
- Alessandri, Piero degli9
- Alessandri, Pietro degli2
- Alessandro, Pietro di1
- Alexander Balas, King of Syria, -145 B.C.1
- Alexander III, Pope, -11811
- Alexander, de Villa Dei. Doctrinale puerorum1