- Shīʻah--Customs and practices1
- Shīʻah--Doctrines--Sources1
- Sibṭ al-Māridīnī, Badr al-Dīn Muḥammad ibn Muḥammad, 1423- Lumʻah al-Māridīnīyah fī sharḥ al-Yāsamīnīyah1
- Sibṭ al-Māridīnī, Badr al-Dīn Muḥammad ibn Muḥammad, 1423- Risālah fī bayān al-ʻamal bi-al-ālah allatī tusammá bi-al-Rubʻ al-mujayyab1
- Siege of Istanbul (Istanbul, Turkey : 1453)1
- Siege warfare1
- Siena (Italy). Balia1
- Sifra di-tseniʻuta1
- Sigismund II Augustus, King of Poland, 1520-15721
- Signed bindings1
- Signification (Logic)1
- Silence--Religious aspects--Islam1
- Silver clasp plates1
- Silver mines and mining1
- Simeon bar Yoḥai, active 2nd century1
- Sixtus IV, Pope, 1414-14841
- Slavery1
- Smelting1
- Smoking (Islamic law)1
- Soderini, Giovanni di Luigi1