- Sententiarum libri IV (Peter Lombard, Bishop of Paris)1
- Sermons, Greek--Translations into Syriac1
- Sermons, Latin1
- Seven last words of Jesus Christ1
- Sin, Venial1
- Sint-Pietersabdij (Ghent, Belgium)1
- Sixtus IV, Pope, 1414-14841
- Solar eclipses1
- Sonnets1
- Spain--Aragon1
- Spain--Morón de la Frontera1
- Spain--Seville1
- Specimens1
- Spiritual life--Catholic Church1
- Stephen, the Younger, Saint, 713 or 714-7641
- Sundials1
- Syriac Christians1
- Syriac bindings1
- Syriac language--Grammar1
- Süleyman I, Sultan of the Turks, 1494 or 1495-15661