Author
- Principio Fabricii1
- Privy Council of the United Kingdom1
- Prizrenli Şemʻî1
- Prudentius1
- Pseudo-Cicero1
- Pseudo-Joachim of Fiore1
- Ptolemaeus Tancredius1
- Qasem-e Anvar1
- Rashe Menaḥem be Yehoshuʻa, ha-Golah1
- Razi al-Din ibn al-Hanbali1
- Regiomontanus1
- Republic of Venice1
- Revanî1
- Robert Cooke1
- Rodolfo Pio da Carpi1
- Safi al-Din al-Urmawi1
- Samarqandī, Muḥammad ibn Maḥmūd1
- Sanai1
- Santa Maria degli Alberighi1
- Sebastian Schindler1