Commemorated October 26
Troparion, Tone 3
Verily, the inhabited world found thee a great help in tribulations and a vanquisher of nations, O fight-bearing one. Wherefore, as thou didst demolish the arrogance of Lahosh, and on the battle-field didst hearten Nestor, beseech, O Saint, Christ God to grant us the Great Mercy.
Kontakion, Tone 2
Verily, God, O Demetrius, who granted thee invincible power hath touched the Church with the live coal of thy blood streams, preserving the city unbreached; for it is established by thee.