Author
- Nizam al-Din al-Nisaburi1
- Palazzo degli Anziani1
- Paul of Venice1
- Peter Paludanus1
- Peter Schmieher1
- Petrarch1
- Pierre Bersuire1
- Pietro Paolo Muscarello1
- Pius II1
- Platonic Academy1
- Podestà of Monterubbiano (Italy)1
- Porcellio1
- Qadi Ayyad1
- Rapolano Terme1
- Richard Burdet1
- Robert de Saint-Martin1
- Roman Catholic Archdiocese of Siena1
- Roman Catholic Diocese of Zaragoza1
- Roman Curia1
- Sacro Regio Consiglio1