From Dom Guéranger's The Liturgical Year.
On this day is commemorated the great martyr Theodore of Amasea, a conscript soldier, who was burnt alive. His praises have been celebrated by St. Gregory of Nyssa; he is honoured in Rome at the foot of the Palatine, and had three churches dedicated to his name in Constantinople. Let us say with the Latin Church:
Prayer
Deus, qui nos beati Theodori Martyris tui confessione gloriosa circumdas et protegia: praesta nobis ex ejus imitatione proficere, et oratione fulciri. Per Dominum.
O God, who dost encompass and protect us by the glorious confession of blessed Theodore thy Martyr; grant us by his example to improve, and by his prayer to be supported. Through our Lord.