Former Owner
- Anne Claude Philippe, Comte de Caylus1
- Anthelme-Michel-Laurent de Migieu, marquis de Savigny1
- Antiquarian Books of Boston3
- Antonio Laserna1
- Antonio Pallavicini Gentili1
- Antonio Saverio Gentili1
- Antonio Ubaldini1
- Archibald Cary Coolidge1
- Archibald Primrose, 5th Earl of Rosebery1
- Arenburg2
- Art ancien S.A.1
- Arthur H. Lea2
- Assemani family1
- Athelstan Riley1
- August Merz1
- Augustus Pugin1
- B.S. Cron1
- Baldassarre Boncompagni1
- Basilica of Sant'Ambrogio1
- Bernard Quaritch Ltd1