Gregory the Illuminator was the founder and first official head of the Armenian Apostolic Church. He converted Armenia from Zoroastrianism to Christianity in the early fourth century, making Armenia the first state to adopt Christianity as its official religion. He is venerated as a saint in the Armenian Apostolic Church and in some other churches.
Vladimir I Sviatoslavich or Volodymyr I Sviatoslavych, given the epithet "the Great", was Prince of Novgorod from 970 and Grand Prince of Kiev from 978 until his death in 1015. The Eastern Orthodox Church canonised him as Saint Vladimir.
The Christianization of Kievan Rus' was a long and complicated process that took place in several stages. In 867, Patriarch Photius of Constantinople told other Christian patriarchs that the Rus' people were converting enthusiastically, but his efforts seem to have entailed no lasting consequences, since the Russian Primary Chronicle and other Slavonic sources describe the tenth-century Rus' as still firmly entrenched in Slavic paganism. The traditional view, as recorded in the Russian Primary Chronicle, is that the definitive Christianization of Kievan Rus' dates happened c. 988, when Vladimir the Great was baptized in Chersonesus (Korsun) and proceeded to baptize his family and people in Kiev. The latter events are traditionally referred to as baptism of Rus' in Russian, Ukrainian and Belarusian literature.
September 24 - Eastern Orthodox liturgical calendar - September 26
Cosmas and Damian were two Arab physicians and early Christian martyrs. They practised their profession in the seaport of Aegeae, then in the Roman province of Cilicia.
August 3 - Eastern Orthodox liturgical calendar - August 5
Saint Anastasia is a Christian saint and martyr who died at Sirmium in the Roman province of Pannonia Secunda. In the Eastern Orthodox Church, she is venerated as St. Anastasia the Pharmakolytria, i.e. "Deliverer from Potions". This epithet is also translated as "One who Cures (Wounds)" in Lampe's A Patristic Greek Lexicon.
August 17 - Eastern Orthodox liturgical calendar - August 19
Artemius, also known as Shallita, spelt Shalita or Chalita was a Syrian general of the Roman Empire and dux Aegypti or imperial prefect of Roman Egypt. He is considered a saint by the Catholic and the Orthodox Churches, by the name of Artemius of Antioch, Mar Shalita of Antioch, and Mar Shalita the Martyr.
The Christianization of sites that had been pagan occurred as a result of conversions in early Christian times, as well as an important part of the strategy of Interpretatio Christiana during the Christianization of pagan peoples. The landscape itself was Christianized, as prominent features were rededicated to Christian saints, sometimes quite directly, as when the island of Oglasa in the Tyrrhenian Sea was christened Montecristo.
December 17 - Eastern Orthodox liturgical calendar - December 19
Eleutherius, also written as Eleutherus, Eleuterus and Eleftherios; sometimes called Liberalis or Liberator, the former transliterations and the latter translations of his and his mother Antia are venerated as Christian saints and martyrs in Greece and Albania.
Saint Paraskevi of Rome is venerated as a Christian martyr of the 2nd century. She was arrested on multiple occasions for her Christianity and was eventually beheaded by the Roman governor Tarasius.
August 24 - Eastern Orthodox liturgical calendar - August 26
Andrew the Apostle, also called Saint Andrew, was an apostle of Jesus. According to the New Testament, he was a fisherman and one of the Twelve Apostles chosen by Jesus. The title First-Called stems from the Gospel of John, where Andrew, initially a disciple of John the Baptist, follows Jesus and, recognizing him as the Messiah, introduces his brother Simon Peter to him.
Nicetas is a Christian martyr of the 4th century, venerated particularly in the Eastern Orthodox Church. His feastday is 15 September. Nicetas was of Gothic origin, living during the 4th century AD. His life spanned the years of Emperor Constantine the Great's sole rule. He belonged to the upper social class of his people. Nicetas was instructed in Christianity by Theophilus of Gothia, a converted bishop, between 325 and 341 AD.
The Michaelion was one of the earliest and most famous sanctuaries dedicated to Saint Michael the Archangel in the Roman Empire. According to tradition, it was built in the 4th century by Emperor Constantine the Great over an ancient pagan temple, and was located just north of Constantinople, in the village of Sosthenion on the European shore of the Bosphorus strait.
Christianity is the predominant religion in Serbia. The Constitution of Serbia defines it as a secular state with guaranteed religious freedom. Eastern Orthodox Christians with 6,079,396 members, comprise 84.5% of country's population. The Serbian Orthodox Church is the largest and traditional church of the country; adherents of it are overwhelmingly Serbs. Public schools in Serbia allow religious teaching, most commonly with the Serbian Orthodox Church. Serbian public holidays include the religious celebrations of Eastern Orthodox Christians. Other Orthodox Christian communities in Serbia include Montenegrins, Romanians, Macedonians, and Bulgarians. The Catholic Church is prominent in north Vojvodina amongst the Hungarian minority. Protestantism is most largely found in Slovak populations within Bački Petrovac and Kovačica. Christianity first arrived in Serbia in the 9th century. It became state-religion in the 9th century when Serbia began to identify as a Christian country. In a 2011 census, 91.22% of Serbians identified as Christian.
This is a timeline of the presence of Eastern Orthodoxy in Greece from 717 to 1204. The history of Greece traditionally encompasses the study of the Greek people, the areas they ruled historically, as well as the territory now composing the modern state of Greece.
