- Phalaris, Tyrant of Agrigentum, active 6th century B.C.2
- Philosophy, Ancient2
- Piccolomini della Triana, Silvio, 1878-19622
- Pilgrims and pilgrimages2
- Pius III, Pope, approximately 1440-15032
- Popes2
- Preaching2
- Privileges and immunities, Ecclesiastical2
- Processionals (Service books)2
- Psychology2
- Quarter bindings2
- Qur'ans2
- Qurʼan--Manuscripts2
- Raised bands2
- Receipts (Acknowledgments)2
- Registers (Lists)2
- Regula (Benedict, Saint, Abbot of Monte Cassino)2
- Reproduction2
- Resurrection2
- Roman law2