Former Owner
- Pietro Giuseppe Ignati Mattei Cattochii1
- Pietro Millini1
- Pietro Odescalchi1
- Pius VI1
- Prince Augustus Frederick, Duke of Sussex1
- Rafael Gomes1
- Raffaello de’ Medici1
- Raphael Nathan Nata Rabinowitz1
- Raphael de Mediolano1
- Reiss & Son1
- Renzo Rizzi libri antichi1
- Ricardo Enrico de Wilde1
- Richard Bennett1
- Richard Henry Wilde1
- Richard Priestley1
- Rinaldo Ridolfini1
- Robert B. Honeyman1
- Robert Brodhead Honeyman1
- Robert Oppenheim1
- Robert S. Pirie1