- San Miniato, Jacopo di1
- San Miniato, Matteo di1
- San Salvatore al Monte (Monastery : Florence, Italy)1
- Sansedoniis, Guccia de1
- Santa Maria Novella (Church : Florence, Italy)1
- Santi, Matteo di1
- Satire, Latin1
- Satires1
- Scanderbeg, 1405?-14681
- Scholasticism1
- Scolari, Giovanni degli1
- Scriptoria1
- Scrolls1
- Sententiarum libri IV (Peter Lombard, Bishop of Paris)1
- Sermons, Latin1
- Serotini, Checca1
- Service books (Music)--Catholic Church1
- Silvestro, Giacomo di1
- Sin, Venial1
- Sixtus IV, Pope, 1414-14841