Former Owner
- Antonio Saverio Gentili1
- Antonio Ubaldini1
- Archibald Cary Coolidge1
- Archibald Primrose, 5th Earl of Rosebery1
- Arenburg1
- August Merz1
- B.S. Cron1
- Baldassarre Boncompagni1
- Basilica of Sant'Ambrogio1
- Bertram Ashburnham, 4th Earl of Ashburnham2
- Bertram Dobell1
- Biblioteca Bottigella1
- Birgittinessenklooster Mariënwater1
- C. Bruscoli1
- C.J. Spence1
- Carlo Morbio1
- Charles Chardin1
- Charles Edward Harris-St. John1
- Charles Eliot Norton2
- Charles Fontaine1