Patriarch of Constantinople in the context of "Little Russia"

The coronation (Greek: στέψιμον, romanized: stépsimon, or στεφάνωσις, stephánosis) was the main symbolic act of accession to the throne of a Byzantine emperor, co-emperor, or empress. Founded on Roman traditions of election by the Senate or acclamation by the army, the ceremony evolved over time from a relatively simple, ad hoc affair to a complex ritual.

In the 5th–6th centuries the coronation became gradually standardized, with the new emperor appearing before the people and army at the Hippodrome of Constantinople, where he was crowned and acclaimed. During the same time, religious elements, notably the presence of the patriarch of Constantinople, became prominent in what was previously a purely military or civilian ceremony. From the early 7th century on, the coronation ceremony usually took place in a church, chiefly the Hagia Sophia, the patriarchal cathedral of Constantinople. The association of the coronation ceremony with Constantinople and the Hagia Sophia became so close that even emperors who had been proclaimed, and crowned, outside the capital as military rebels or usurpers, usually repeated their coronation in the capital once they had won power.

The Council of Ephesus was a council of Christian bishops convened in Ephesus (near present-day Selçuk in Turkey) in AD 431 by the Roman Emperor Theodosius II. This third ecumenical council, an effort to attain consensus in the church through an assembly representing all of Christendom, confirmed the original Nicene Creed, and condemned the teachings of Nestorius, Patriarch of Constantinople, who preferred that the Virgin Mary be called Christotokos, "Christ-bearer" over Theotokos, "God-bearer"; in contrast to Cyril of Alexandria who deemed that Theotokos is enough on its own. It met from 22 June to 31 July 431 at the Church of Mary in Ephesus in Anatolia.

The siege of Jerusalem lasted from 20 September to 2 October 1187, when Balian of Ibelin surrendered the city to Saladin. Earlier that summer, Saladin had defeated the kingdom's army and conquered several cities. Balian was charged with organizing a defense. The city was full of refugees but had few soldiers. Despite this fact the defenders managed to repulse several attempts by Saladin's army to take the city by storm. Balian bargained with Saladin to buy safe passage for many, and the city was peacefully surrendered with limited bloodshed. Though Jerusalem fell, it was not the end of the Kingdom of Jerusalem, as the capital shifted first to Tyre and later to Acre after the Third Crusade. Latin Christians responded in 1189 by launching the Third Crusade led by Richard the Lionheart, Philip Augustus, and Frederick Barbarossa separately. In Jerusalem, Saladin restored Muslim holy sites and generally showed tolerance towards Christians; he allowed Orthodox and Eastern Christian pilgrims to visit the holy sites freely—though Frankish (i.e. Catholic) pilgrims were required to pay a fee for entry. The control of Christian affairs in the city was handed over to the patriarch of Constantinople.

Michael Rohoza (died 1599) was the Metropolitan of Kiev, Galicia and all Rus' in the Patriarchate of Constantinople of the Eastern Orthodox Church from 1588 to 1596. In 1595, he signed the Union of Brest which moved the metropolis from the ecclesiastical jurisdiction of the Patriarchate of Constantinople to the jurisdiction of the Holy See. By this act, the Ruthenian Uniate Church was formed in the territory of the Polish–Lithuanian Commonwealth. From 1596 until his death in 1599, he held the title of Metropolitan of Kiev, Galicia and all Rus' in the Ruthenian Uniate Church.

Isaac I Komnenos or Comnenus (Ancient Greek: Ἰσαάκιος Κομνηνός, romanized: Isaákios Komnēnós; c. 1007 – 1 June 1060) was Byzantine emperor from 1057 to 1059, the first reigning member of the Komnenian dynasty.

The son of the general Manuel Erotikos Komnenos, he was orphaned at an early age, and was raised under the care of Emperor Basil II. He made his name as a successful military commander, serving as commander-in-chief of the eastern armies between c. 1042 and 1054. In 1057 he became the head of a conspiracy of the dissatisfied eastern generals against the newly crowned Michael VI Bringas. Proclaimed emperor by his followers on 8 June 1057, he rallied sufficient military forces to defeat the loyalist army at the Battle of Hades. While Isaac was willing to accept a compromise solution by being appointed Michael's heir, a powerful faction in Constantinople, led by the ambitious Patriarch of Constantinople, Michael Keroularios, pressured Michael to abdicate. After Michael abdicated on 30 August 1057, Isaac was crowned emperor in the Hagia Sophia on 1 September.

The Byzantine civil war of 1341–1347, sometimes referred to as the Second Palaiologan Civil War, was a conflict that broke out in the Byzantine Empire after the death of Andronikos III Palaiologos over the guardianship of his nine-year-old son and heir, John V Palaiologos. It pitted on the one hand Andronikos III's chief minister, John VI Kantakouzenos, and on the other a regency headed by the Empress-Dowager Anna of Savoy, the Patriarch of Constantinople John XIV Kalekas, and the megas doux Alexios Apokaukos. The war polarized Byzantine society along class lines, with the aristocracy backing Kantakouzenos and the lower and middle classes supporting the regency. To a lesser extent, the conflict acquired religious overtones; Byzantium was embroiled in the Hesychast controversy, and adherence to the mystical doctrine of Hesychasm was often equated with support for Kantakouzenos.

As the chief aide and closest friend of Emperor Andronikos III, Kantakouzenos became regent for the underage John V upon Andronikos's death in June 1341. While Kantakouzenos was absent from Constantinople in September the same year, a coup d'état led by Alexios Apokaukos and the Patriarch John XIV secured the support of Empress Anna and established a new regency. In response, Kantakouzenos' army and supporters proclaimed him co-emperor in October, cementing the rift between himself and the new regency. The split immediately escalated into armed conflict.

The Photian Schism was a four-year (863–867) schism between the episcopal sees of Rome and Constantinople. The issue centred on the right of the Byzantine Emperor to depose and appoint a patriarch without approval from the papacy.

In 857, Ignatius was deposed or compelled to resign as Patriarch of Constantinople under the Byzantine Emperor Michael III for political reasons. He was replaced the following year by Photius. The pope, Nicholas I, despite previous disagreements with Ignatius, objected to what he considered the improper deposition of Ignatius and the elevation of Photius, a layman, in his place. After his legates exceeded their instructions in 861 by certifying Photius's elevation, Nicholas reversed their decision in 863 by excommunicating Photius.