- Syria--Damascus1
- Syriac scripts1
- Tales1
- Talkhīṣ Miftāḥ al-ʻulūm (Qazwīnī, Jalāl al-Dīn Muḥammad ibn ʻAbd al-Raḥmān)1
- Talmud1
- Tamil language1
- Tanqīḥ al-uṣūl (Maḥbūbī, ʻUbayd Allāh ibn Masʻūd)1
- Targum sheni1
- Tarquinius Superbus, Lucius, King of Rome, active 534 B.C.-510 B.C.1
- Tasʹhīl al-fawāʼid wa-takmīl al-maqāṣid (Ibn Mālik, Muḥammad ibn ʻAbd Allāh)1
- Taxation1
- Te Deum laudamus (Music)1
- Teleology1
- Tenth of Muḥarram1
- Teodósio, Prince of Portugal, 1634-16531
- Tetragrammaton1
- Theology, Doctrinal--Middle Ages1
- Theology, Practical1
- Theology--Middle Ages1
- Thirty Years' War (1618-1648)1