Author
- Porphyry1
- Prince-Bishopric of Toul1
- Principio Fabricii1
- Priori (Florence)1
- Privy Council of the United Kingdom1
- Procopius1
- Pseudo-Augustine1
- Pseudo-Dionysius the Areopagite1
- Pseudo-Phalaris1
- Ptolemaeus Tancredius1
- Ptolemy1
- Qasem-e Anvar1
- Ramon Llull1
- Ranieri Farnese1
- Ranuccio Farnese1
- Rapolano Terme1
- Raymond of Sabunde1
- Regia Camera (Duchy of Milan)1
- Richard Bolter1
- Richard Burdet1