- Pentecost2
- Petrucci, Pandolfo, 1452-15122
- Philip IV, King of Spain, 1605-16652
- Philosophy2
- Philosophy and religion2
- Philosophy, Ancient2
- Philosophy, Medieval2
- Piccolomini, Antonio Maria d'Enea2
- Pictorial works2
- Pius V, Pope, 1504-15722
- Plague2
- Prophecies2
- Psychology2
- Pythagoras and Pythagorean school2
- Regula (Augustine, of Hippo, Saint)2
- Regula (Benedict, Saint, Abbot of Monte Cassino)2
- Requesens, Antonio de'2
- Requesens, Bernardo de'2
- Rhetoric--Study and teaching2
- Rhetorica ad Herennium2