In 451, during the reign of the Sovereigns Marcian and Pulcheria, the Fourth Ecumenical Council was convoked in Chalcedon against Eutyches and those of like mind with him. After much debate, the Fathers who were the defenders of Orthodoxy, being 630 in number, agreed among themselves and with those who were of contrary mind, to write their respective definitions of faith in separate books, and to ask God to confirm the truth in this matter. When they had prepared these texts, they placed the two tomes in the case that held Saint Euphemia's relics, sealed it, and departed. After three days of night-long supplications, they opened the reliquary in the presence of the Emperor, and found the tome of the heretics under the feet of the Martyr, and that of the Orthodox in her right hand. (For her life, see Sept. 16.)

Saint Olga, renowned for her wisdom and sobriety, in her youth became the wife of Igor, Great Prince of Kiev, who ruled during the tenth century. After her husband's death, she herself ruled capably, and was finally moved to accept the Faith of Christ. She traveled to Constantinople to receive Holy Baptism. The Emperor, seeing her outward beauty and inward greatness, asked her to marry him. She said she could not do this before she was baptized; she furthermore asked him to be her Godfather at the font, which he agreed to do. After she was baptized (receiving the name of Helen), the Emperor repeated his proposal of marriage. She answered that now he was her father, through holy Baptism, and that not even among the heathen was it heard of a man marrying his daughter. Gracefully accepting to be outwitted by her, he sent her back to her land with priests and sacred texts and holy icons. Although her son Svyatoslav remained a pagan, she planted the seed of faith in her grandson Vladimir (see July 15). She reposed in peace in 969.

These Martyrs contested in Ancyra in 106, during the reign of the Emperor Trajan. Saint Proclus was seized as a Christian and, confessing his faith, was burned on his sides and belly, was hung upon a beam with heavy stones tied to his feet, and finally was taken away to be shot with arrows. As he was being led forth, his nephew Hilary encountered him and greeted him, and was himself seized. After his uncle had been slain with arrows, Hilary, because he would not deny Christ, was tormented, then beheaded.

It is believed that the Synaxis of the Archangel Gabriel was transferred to this day from March 26 so that it could be celebrated more festively than in the period of the Great Fast; and, in fact, all the miracles of the Archangel are celebrated on this feast day, which has been listed here in the church books since the ninth century.

According to some, the Saint Stephen celebrated today was a nephew of Saint John of Damascus, different from the one celebrated on October 28, who later also became a Bishop.

Saint Golindoux was a Persian, living in the reign of Chosroes II, King of Persia (590-628), and of Maurice, Emperor of New Rome (582-602). Moved by a divine revelation to become a Christian, she was betrayed to Chosroes by her husband and was cast into a dungeon called Oblivion for eighteen years, withstanding all attempts to make her deny Christ, and preserved by the grace of God. Set at liberty through the visitation of an Angel, she went to Jerusalem, and then to Constantinople, where she fell asleep in peace. She was called Mary in holy Baptism.

Saint Aquila, who was from Pontus of Asia Minor, was a Jew by race and a tent-maker by trade. In the year 52 he and his wife Priscilla were in Corinth when Saint Paul first came there. They gave him hospitality, and the Apostle remained with them for many days, himself working at the same trade as they (Acts 18:2-3). And having believed in Christ through Paul, they followed him from that time on, working together with him and suffering perils with him for the sake of the preaching of the Gospel, as he himself testifies concerning them in his Epistle to the Romans, saying: "Greet Priscilla and Aquila, my helpers in Christ Jesus: who have for my life laid down their own necks: unto whom not only I give thanks, but also all the churches of the nations" (Rom. 16:3-4). When and where they reposed is unknown.

Saint Joseph was the brother of Saint Theodore the Studite (see Nov. 11). He also is called Studite, especially when he is mentioned together with his brother. According to Codinus, both of them composed the canons of the Triodion during the reign of Leo the Armenian, while in the Church of Saint Romanus (see Nov. 18); he is not to be confused with Saint Joseph the Hymnographer (Apr. 3). When Saint Joseph became Archbishop of Thessalonica, he was exiled thrice because of his godly zeal for the holy icons, suffering many hardships, imprisonments in dark dungeons, hunger, thirst, and every tribulation, in the midst of which he departed unto eternal life in 833.

Saint Julitta was from the city of Iconium. Fearing the persecution of Diocletian, she took her son Cyricus, who was three years old, and departed for Seleucia; but finding the same evil there, she went over to Tarsus in Cilicia, where the ruler arrested her. He took her son from her and tried with flatteries to draw the youth to himself. But the little one, in his childish voice, called on the Name of Christ and kicked the ruler in the belly so hard, that the tyrant became enraged and cast him down the steps of the tribunal. In this manner, the child's head was crushed, and he gave up the spirit. As for his blessed mother, she first endured many torments, and finally was beheaded in the year 296.

Grandson of Saint Olga, Saint Vladimir ascended the throne of Kiev in 980. Though a zealous idolater, he was illumined by the grace of God, accepted the Christian Faith, and completely changed his ways. He was baptized in Cherson in 988, receiving the name Basil; he came forth from the font not only healed of a blindness lately afflicting him, but also from being passionate and warlike, he became meek, peaceable, and exceedingly godly. Whereas his grandmother had refused marriage with the Emperor in Constantinople (see July 11), he married Anna, sister of the Emperors Basil and Constantine, and was accompanied home by priests from Constantinople. Diligently seeking to spread Christianity throughout his realm like a new Constantine, he destroyed the idols (having the chief diety Perun scourged and then cast into the Dnieper River), and summoned all his subjects to Holy Baptism. He reposed in peace in 1015.

This Saint was from Sebastia of Cappadocia and , according to the Synaxaristes, became Bishop of Pidachthoa. He and ten of his disciples were tortured and beheaded by the Governor of Philomarchus in the times of Diocletian. There is a second Martyr Athenogenes commemorated today, mentioned by Saint Basil in Chapter 29 of his treatise "On the Holy Spirit"; it is said that as this Athenogenes approached the fire, wherein he was to die a martyric death, he chanted the hymn O Joyous Light in praise of the Holy Trinity (see also Mar. 11).

This Martyr lived during the reign of Claudius II (268-270). She was from Pisidia of Cilicia and was the only daughter of a certain priest of the idols. On being orphaned by her mother, she was handed over to a certain woman who instructed her in the Faith of Christ. When she was fifteen years old, she was apprehended by the ruler of Olmbrius, and when asked her name, homeland, and faith, she answered: "My name is Marina; I am the offspring of the Pisidia; I call upon the Name of my Lord Jesus Christ." Because of this she endured bonds, imprisonment, and many whippings, and was finally beheaded in the year 270. Saint Marina is especially invoked for deliverance from demonic possession.

On the Sunday that falls from the 13th to the 19th of the present month, we chant the Service to the 630 Holy and God-bearing Fathers who came together for the 4th Ecumenical Council who assembled in Chalcedon in 451, to condemn Eutyches, who taught that there was only one nature, the divine, in Christ after the Incarnation, and Dioscorus, Patriarch of Alexandria, who illegally received Eutyches back into communion and deposed Saint Flavian, Patriarch of Constantinople, who had excommunicated Eutyches.

In the Slavic tradition, on this Sunday, the Fathers of the first six Ecumenical Councils are all commemorated.