- Talismans1
- Talkhīṣ Miftāḥ al-ʻulūm (Qazwīnī, Jalāl al-Dīn Muḥammad ibn ʻAbd al-Raḥmān)1
- Tax assessment1
- Taxation, Papal1
- Tello de Guzmán, Francisco, d. 16031
- Theological anthropology--Islam1
- Theology1
- Theology, Doctrinal1
- Theoricae novae planetarum (Peurbach, Georg von)1
- Timekeeping1
- Timur, 1336-14051
- Tithes1
- Toletanus, Alphonsus Corduba1
- Transmutation (Chemistry)1
- Treviso (Italy). Podestà1
- Trierchi, Francesco1
- Truthfulness and falsehood1
- Turenne, Antoine de La Tour d'Auvergne, vicomte de1
- Turkey--Erzurum1
- Turkey--Kütahya1