- Piccolomini, Antonio Maria d'Enea2
- Pictorial works2
- Pius V, Pope, 1504-15722
- Plague2
- Prophecies2
- 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
- Romania--Transylvania2
- Rossi, Girolamo de'2
- Sacred vocal music2
- San Marziano (Monastery : Tortona, Italy)2
- San Miniato, Cosimo di2
- San Miniato, Giovanni di2
- San Miniato, Jacopo di2
- San Miniato, Michele di2