- Prescriptions, formulae, receipts, etc.1
- Prisoners1
- Prophecies1
- Prophecy1
- Reformation1
- Relations1
- Requesens, Antonio de'1
- Requesens, Berengario de'1
- Requesens, Bernardo de'1
- Requesens, Giuseppe de'1
- Santa Maria del Fiore (Cathedral : Florence, Italy)1
- Sea-power1
- Seventeenth century1
- Siege of Istanbul (Istanbul, Turkey : 1453)1
- Sigismund II Augustus, King of Poland, 1520-15721
- Sources1
- Speeches, addresses, etc., Latin1
- Switzerland1
- Süleyman I, Sultan of the Turks, 1494 or 1495-15661
- Trials (Heresy)1