Author
- Piccolomini1
- Pierre Bersuire1
- Pietro de' Crescenzi1
- Pius II1
- Platonic Academy1
- Podestà of Monterubbiano (Italy)1
- Podestà of Perugia1
- Pomponius Mela1
- Porcellio1
- Prince-Bishopric of Toul1
- Pseudo-Augustine1
- Pseudo-Phalaris1
- Ramon Llull1
- Rapolano Terme1
- Raymond of Sabunde1
- Regiomontanus1
- Richard Burdet1
- Richard II of England1
- Roger Waltham1
- Roman Catholic Archdiocese of Mainz1