Union of Brest in the context of "Ruthenian Uniate Church"

Metropolitan of Kyiv is an episcopal title that has been created with varying suffixes at multiple times in different Christian churches, though always maintaining the name of the metropolitan city — Kiev (Kyiv) — which today is located in the modern state of Ukraine. The church was canonically established and governed by the Ecumenical Patriarch of Constantinople in Kievan Rus'. Following the Council of Florence and the Union of Brest, there are now parallel apostolic successions: in the Russian Orthodox Church, the Orthodox Church of Ukraine, the Ruthenian Uniate Church and its successors. This list contains the names of all the metropolitan bishops (hierarchs) who have claimed the title. It is arranged chronologically and grouped per the claimed jurisdiction.

The Ukrainian Greek Catholic Church (UGCC) is a major archiepiscopal sui iuris ("autonomous") Eastern Catholic church that is based in Ukraine. As a particular church of the Catholic Church, it is in full communion with the Holy See. The major archbishop presides over the entire Church but is not distinguished with the patriarchal title. The incumbent Major Archbishop is Sviatoslav Shevchuk.

The church regards itself as a successor to the metropolis that was established in 988 following the Christianization of Kievan Rus' by Grand Prince Vladimir the Great. Following the establishment of the metropolis of Kiev, Galicia and all Rus', by the terms of the Union of Brest, the Ruthenian church was transferred from the ecclesiastical jurisdiction of the Ecumenical Patriarchate of Constantinople to the jurisdiction of the Holy See in 1596, thereby forming the Ruthenian Uniate Church. The Union of Brest was a treaty between the Ruthenian Orthodox Church in the Polish–Lithuanian Commonwealth, under the leadership of the metropolitan of Kiev, Galicia and all Rus'—Michael III—on one part, and the Latin Church under the leadership of Pope Clement VIII on the other part.

Brest, formerly Brest-Litovsk and Brest-on-the-Bug, is a city in south-western Belarus at the border with Poland opposite the Polish town of Terespol, where the Bug and Mukhavets rivers meet, making it a border town. It serves as the administrative center of Brest Region and Brest District, though it is administratively separated from the district. As of 2025, it has a population of 346,061.

Brest is one of the oldest cities in Belarus and a historical site for many cultures, as it hosted important historical events, such as the Union of Brest and Treaty of Brest-Litovsk. Furthermore, the Brest Fortress was recognized by the Soviet Union as a Hero Fortress in honour of the defense of Brest Fortress in June 1941.

The Vilnian Baroque (Lithuanian: Vilnietiškas barokas, Polish: barok wileński) or the School of Vilnius Baroque (Lithuanian: Vilniaus baroko mokykla, Polish: wileńska szkoła baroku) is a name of late Baroque architecture style in Catholic church architecture of the Grand Duchy of Lithuania, which expanded well into Greek Catholic church architecture on territories covered by the Union of Brest. The style was formed by alumnus of the Catholic Jesuits' Vilnius University. Most preserved buildings in this style are in Vilnius.

The architect Johann Christoph Glaubitz is considered one of the founders of Vilnian Baroque. Working on the restoration of churches in Vilnius, he was often inspired by contemporary buildings of Austria and Bavaria. Polish churches created by Paolo Fontana [it] are also made in Vilnian Baroque style. Although being predominantly Catholic style of architecture, Vilnian Baroque was also popular among the Uniates, which gave the style its second name ‘Uniate Baroque’. Another famous architect Thomas Zebrowski also designed and supervised constructions of Vilnian Baroque churches in Lithuania and Belarus.

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.

The Metropolis of Kyiv (Greek: Μητρόπολις Κιέβου, romanized: Mitrópolis Kiévou; Ukrainian: Ки́ївська митропо́лія, romanized: Kyivska mytropoliia; Belarusian: Кіеўская мітраполія, Kijeŭskaja mitrapolija) was an autonomous metropolis of the Ecumenical Patriarchate of Constantinople with center in Kyiv after its formation in 988 as a result of the Christianization of Rus by Volodymyr the Great until January 6, 2019, when it received the Tomos on Autocephaly.

In 1596, the Union of Brest was adopted which transferred the ecclesiastical jurisdiction of the metropolis from the Ecumenical Patriarchate to the Holy See. As a sui juris Eastern Catholic particular church, the metropolis retained its ancient rights; in time, it came to be known as the Ruthenian Uniate Church. Some clergy and laity in the Commonwealth continued to give their loyalty to Constantinople but had no hierarchs to support them. In 1620, the Ukrainian Cossacks, led by Hetman Petro Konashevych-Sahaidachny, secured the restoration of the Orthodox hierarchy in the Commonwealth as the Metropolis of Kiev, Galicia and all Rus'.

The Belarusian Greek Catholic Church, or the Belarusian Byzantine Catholic Church, is one of the 23 Eastern Catholic sui iuris particular churches that are in full communion with the Holy See. It is the heir within Belarus to the Union of Brest and the Ruthenian Uniate Church.
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The Metropolis of Kiev, Galicia and all Ruthenia was an ecclesiastical territory or archeparchy of the Ruthenian Uniate Church, a particular Eastern Catholic church. It was erected in the Polish–Lithuanian Commonwealth in 1595/96 following the Union of Brest. It was effectively disestablished by the partitions of Poland (1772–1795). Its successor — the Ukrainian Greek Catholic Church — continues to operate in the modern states of Ukraine and Poland. The first metropolitan was Michael Rohoza.