- Pelayo, King of Asturias, -7372
- Penmanship manuals2
- Persian language--Pronunciation2
- Persian language--Rhyme2
- Persian language--Synonyms and antonyms2
- Persius2
- Peter Lombard, Bishop of Paris, approximately 1100-11602
- Petrucci, Pandolfo, 1452-15122
- Phalaris, Tyrant of Agrigentum, active 6th century B.C.2
- Philosophers, Ancient2
- Piccolomini, Antonio Maria d'Enea2
- Piccolomini, Pomponio de Bartolomei2
- Piety2
- Pigments2
- Pius II, Pope, 1405-14642
- Pius IV, Pope, 1499-15652
- Pius V, Pope, 1504-15722
- Planetary theory2
- Plays (performing arts compositions)2
- Poems (ʻAlī ibn Abī Ṭālib, Caliph)2