Former Owner
- Oliver Henry Perkins1
- Otto Ege1
- Otto Orren Fisher1
- Otto Schäfer1
- P. Desq1
- Paolino Gianfilippi1
- Paul de Berthou1
- Peterborough Central Library1
- Philip III the Good1
- Piero Ginori Conti1
- Pietro Antonio Crevenna1
- Pietro Antonio Maffei1
- Pietro Canal1
- Prosper Blanchemain1
- Raoul Chandon de Briailles1
- Raymond Berriot2
- Reading Abbey7
- Reginald Cholmondeley1
- Richard Heber1
- Riederer, Georg Wilhelm1