Saint Demetrios along with Saint George are the two brave young men of Christianity. These two are below on earth, and the two Archangels Michael and Gabriel are above in heaven.
In ancient times they were painted without armor, but in later years they were depicted armored with swords and spears and dressed in metal breastplates. On one shoulder they have their helmet hanging, and on the other their shield. At the waist they are girded with the straps which hold the sheath of the sword and the quiver which has in it the arrows and the bow. In recent years, after the conquest of Constantinople, these two saints, and many times other soldier saint as well, are painted as riding horses--Saint George on a white horse, Saint Demetrios on a red one.
Saint Demetrios, the Great Martyr and Myhrr-Gusher, was born in Thessalonica in 260 A.D. His parents were illustrious people and along with the transitory glory which Demetrios had from his family, he was adorned with imperishable virtues: with prudence, sweetness, humility, justice, and with every noble comeliness of the soul. All these were like precious stones which shone on the crown which he wore, and this crown was his faith in Christ.
In those days, Diocletian reigned in Rome, and he had appointed as caesar in the parts of Macedonia and the East a hard-hearted and bloodthirsty general who was called Maximian--a beast in human form as were all those military rulers who then ruled the world with the sword: Diocletian, Maxentius, Maximian, Galerius, and Licinius. They were hard headed, fierce-faced, strong-jawed, grim-mouthed, with short thick necks like barrels, ruthless, and terrifying. He in turn appointed Demetrios ruler of Thessalonica and all Thesalia. When Maximian returned from a certain war, he gathered the officers of Thessalonica in order to offer sacrifice to the idols. Then Demetrios revealed that he was a Christian, and did not accept hewn stones as gods.
Maximian flew into a rage and ordered that he be tried and imprisoned in a bath. And all the while he was imprisoned, the populace ran with mourning to hear Demetrios teach the people of Christ. A young lad, Nestor, also went every day and heard his teaching.
During those days, many brave men fought in the stadium and Maximian rejoiced at these spectacles. He even had a certain henchman Lyaeus, a beastly man, brass-knuckled, an idolator and blasphemer, brought from some barbarous nation. Nestor, seeing that this Lyaeus had defeated all and boasted that he had the strength of Ares, the pagan god of war, and that no native dared wrestle with him, went to the prison and besought Saint Demetrios to bless him to defeat and put to shame Lyaeus, Maximian, and their religion.
Saint Demetrios prayed and made the sign of the Cross over him; immediately Nestor ran to the stadium and wrestled with that fierce giant, and he threw him down and slew him. Then Maximian became beside himself with rage. Learning that Nestor was a Christian and that Saint Demetrios had blessed him, he ordered the soldiers to have them put to death.
They went to the bath and pierced Saint Demetrios with their spears, and thus he received the eternal crown on the 26th of October, 296 A.D., at the age of thirty-six. It is written that when he saw the soldeirs thrusting their spears at him, he raised high his arm so that they could pierce his side, that might be deemed worthy to receive the same wound as did Christ in His side, and there ran blood and water from the wound. Nestor was beheaded the next day (holy Martyr Nestor of Thessalonica is commemorated in the holy Orthodox Church on October 27/November 8) outside the wall at the Golden Gate. He was killed with his own sword.
The Christians took the holy remains and buried them side by side, and from the grave of Saint Demetrios there came forth holy myrrh, which cured many diseases. For this reason he is called Myrovletes. Over his holy grave and the place of his holy martyrdom there was built a church in the form of a basilica which stands to this day. In 1143 the Emperor Manuel Comnenos sent from Constantinople for the holy icon of the Saint preserved at his tomb, and placed it in the Monastery of Pantocrator, the church of which was build by the Comneni. Today it is called today Zeirek.
Saint Demetrios longed above all for the Kingdom of Heaven, of which he was made worthy. Through his prayers, may we also be vouchsafed this kingdom.
From: The Orthodox Word, Saint Herman of Alaska Brotherhood, Platina, California