Trajan, emp., epistle to Pliny, [22].
Trinity, [112] ff., [171-181], [222-225], [368].
Trisagion, [541] f.
True Word of Celsus, [56-59].
Typos of Constans II, [662-664].
Ulfilas, [425-427];
his creed, [426].
Unity of the Church, [240-245].
Universal salvation, [198].