Greek Orthodox Patriarch of Jerusalem in the context of "Greek Orthodox Patriarchate of Jerusalem"

Pentarchy (from Ancient Greek Πενταρχία (Pentarchía), from πέντε (pénte) 'five' and ἄρχειν (archein) 'to rule') was a model of Church organization formulated in the laws of Emperor Justinian I (r.  527–565) of the Roman Empire. In this model, the Christian Church is governed by the heads (patriarchs) of the five major episcopal sees of the Roman Empire: Rome, Constantinople, Alexandria, Antioch, and Jerusalem.

The idea came about because of the political and ecclesiastical prominence of these five sees, but the concept of their universal and exclusive authority was attached to earlier Hellenistic-Christian ideas of administration. The pentarchy was first legally expressed in the legislation of Emperor Justinian I, particularly in Novella 131. The Quinisext Council of 692 gave it formal recognition and ranked the sees in order of preeminence, but its organization remained dependent on the emperor, as when Leo the Isaurian altered the boundary of patriarchal jurisdiction between Rome and Constantinople. Especially following Quinisext, the pentarchy was at least philosophically accepted in Eastern Orthodoxy, but in the West, the Rome based patriarchy evolved into the Roman Catholic Church, which would reject the Council as well as the concept of the pentarchy, considering itself the supreme church with universal jurisdiction.

Patriarch Theophilos III of Jerusalem (Greek: Πατριάρχης Ιεροσολύμων Θεόφιλος Γ'; Arabic: غبطة بطريرك المدينة المقدسة اورشليم وسائر أعمال فلسطين كيريوس كيريوس ثيوفيلوس الثالث, romanized: Ghabṭat baṭrīark al-madīnat al-muqaddasa Urshālim wa sā'ir A'māl Filasṭīn Kiryūs Kiryūs Thiyūfīlūs al-thālith; born 4 April 1952) is the current Patriarch of the Orthodox Church of Jerusalem since 2005. He is styled Patriarch of the Holy City of Jerusalem and all Palestine, Syria, Arabia, beyond the Jordan River, Cana of Galilee, and Holy Zion.

Theophilos (also spelled Theofilos or Theophilus) was elected unanimously on 22 August 2005 by the Holy Synod of Jerusalem as the 141st primate of the Orthodox Church of Jerusalem to succeed the deposed Irenaios. His election was confirmed by the Eastern Orthodox synod of Constantinople, and was endorsed by Jordan on 24 September 2005, and subsequently by the Palestinian Authority. He was enthroned on 22 November 2005, despite initial Israeli objections. The Israeli government officially recognized Theophilos' election on 16 December 2007.

Christianity in the Middle Ages covers the history of Christianity from the fall of the Western Roman Empire (c. 476). The end of the period is variously defined - depending on the context, events such as the conquest of Constantinople by the Ottoman Empire in 1453, Christopher Columbus's first voyage to the Americas in 1492, or the Protestant Reformation in 1517 are sometimes used.

In Christianity's ancient Pentarchy, five patriarchies held special eminence: the sees of Rome, Constantinople, Jerusalem, Antioch, and Alexandria. The prestige of most of these sees depended in part on their apostolic founders, or in the case of Byzantium/Constantinople, that it was the new seat of the continuing Eastern Roman, or Byzantine Empire. These bishops considered themselves the successors of those apostles. In addition, all five cities were early centres of Christianity, losing their importance after the Levant was conquered by the Sunni Caliphate.

The Equestrian Order of the Holy Sepulchre of Jerusalem (Latin: Ordo Equestris Sancti Sepulcri Hierosolymitani, OESSH), also called the Order of the Holy Sepulchre or Knights of the Holy Sepulchre, is a Catholic order of knighthood under the protection of the Holy See. The pope is the sovereign of the order. The order creates canons as well as knights, with the primary mission to "support the Christian presence in the Holy Land". It is an internationally recognised order of chivalry. The order is estimated to have some 30,000 knights and dames in 60 lieutenancies around the world. The Catholic Order is distinct from the Greek Orthodox "Equestrian Order of the Holy Sepulchre", presided over by the Greek Orthodox Patriarch of Jerusalem.

The Cardinal Grand Master has been Fernando Filoni since 2019, and the Latin Patriarch of Jerusalem is ex officio the Order's Grand Prior. Its headquarters are situated at the Palazzo Della Rovere and its official church in Sant'Onofrio al Gianicolo, both in Rome, close to Vatican City. In 1994, Pope John Paul II declared the Virgin Mary as the order's patron saint under the title "Blessed Virgin Mary, Queen of Palestine".

The Brotherhood of the Holy Sepulchre, or Holy Community of the All-Holy Sepulchre, is an Eastern Orthodox monastic fraternity guarding the Church of the Holy Sepulchre and other Christian holy places in the Holy Land. It was founded in its present form during the British Mandate in Palestine (1920-1948). Headed by the Greek Orthodox Patriarch of Jerusalem, the brotherhood also administers the Greek Orthodox Church of Jerusalem, such as metropolitans, archbishops, bishops, archimandrites, hieromonks, hierodeacons, and monks.

The brotherhood's symbol is the taphos, a monogram of the Greek letters tau (Τ) and phi (Φ), for the word taphos (τάφος, meaning "sepulchre, grave"). It can be seen on most Greek Orthodox buildings in Jerusalem.

The Holy Synod of Jerusalem is the senior ruling body of the Greek Orthodox Patriarchate of Jerusalem and the Brotherhood of the Holy Sepulchre.

The synod consists of 18 members nominated by the Patriarch in a session of the Holy Synod itself. It normally consists of all of the bishops and several senior archimandrites (or younger archimandrites who are likely to be made bishops at some point).