- Speeches, addresses, etc., Italian1
- Spirits1
- Spiritual life--Catholic Church2
- Spirituality--Catholic Church1
- Spurious and doubtful works1
- Stamps10
- Statutes5
- Statutes and codes1
- Stephen, the Younger, Saint, 713 or 714-7641
- Stoddard, Anthony, 1678-17601
- Stoics1
- Sufism5
- Sufism--Prayers and devotions2
- Summa theologica (Thomas, Aquinas, Saint)2
- Sunan (Abū Dāʼūd Sulaymān ibn al-Ashʻath al-Sijistānī)1
- Sunan (Ibn Mājah, Muḥammad ibn Yazīd)1
- Sunan al-kubrá (Bayhaqī, Aḥmad ibn al-Ḥusayn)1
- Switzerland2
- Symbolism1
- Symptoms1