- Procedure (Law)1
- Processions1
- Protasius, Saint and Martyr1
- Provençal language1
- Providence and government of God--Christianity1
- Public law (Roman law)1
- Puccetti, Piero1
- Puccetti, Pietro1
- Puga family1
- Pugi, Leonardo1
- Punic War (1st) (264-241 B.C.)1
- Pupi, Benedetto1
- Puñonrostro, Juan Arias de Avila Portocarrero, conde de, active 16th century1
- Quaestiones disputatae1
- Qurʼan--Manuscripts1
- Rabanus Maurus, Archbishop of Mainz, 784?-8561
- Raffaello, Niccolò di1
- Raimundus1
- Ranieri, Ciato di1
- Raolée, Guillaume, active 12541