The Holy Right-believing Tsarevich Demetrios of Uglich and Moscow - Troparion & Kontakion
Troparion — Tone 4
You reddened the royal diadem with your blood, O divinely-wise Martyr; / for instead of a scepter, you received a cross in your hand. / You were revealed as victorious, / and offered yourself as an unblemished sacrifice to the Master; / for you were slaughtered as a submissive lamb by a servant, / but now you stand rejoicing before the Holy Trinity. / Pray that all who revere your holy memory may be saved.
Kontakion — Tone 8
Today, on the glorious day of your remembrance, joy shines forth for the faithful, / for you sprouted forth as a good branch of the vine1 and offered yourself as comely fruit to Christ. / Therefore, after you were murdered, He preserved your blood-stained body incorrupt. / O noble Saint Demetrios, keep all Orthodox Christians unharmed, for you are their confirmation.
1 John 15:5