TheMetropolis of Kiev, Galicia and all Ruthenia was an ecclesiastical territory orarcheparchy of theRuthenian Uniate Church, aparticularEastern Catholic church. It was erected in thePolish–Lithuanian Commonwealth in 1595/96 following theUnion of Brest. It was effectively disestablished by thepartitions of Poland (1772–1795). Its successor — theUkrainian Greek Catholic Church — continues to operate in the modern states ofUkraine andPoland. The firstmetropolitan wasMichael Rohoza.

Within the Commonwealth, the metropolis had the followingsuffragandioceses andarchdioceses (archeparchies):
Pope Clement VIII's 1596 bullDecet Romanum Pontificem gave metropolitans the same rights that Kievan metropolitans had enjoyed under Constantinople. In elections for the office, candidates were chosen by direct vote of the assembled bishops and by the Superior-General (Proto-Archimandrite) of theBasilian order. He would then be nominated by the Polish king and confirmed by the pope.
For much of the 17th century, thePolish–Lithuanian Commonwealth wasat war with theTsardom of Russia. TheKhmelnytsky Uprising (1648–1657) also known as the Cossack–Polish War,[1][2][3] was aCossackrebellion in the eastern territories of the Commonwealth, which led to the creation of aCossack Hetmanate inright-bank Ukraine. As a result, the Kiev and Chernihiv dioceses which lay in the hetmanate were lost to the metropolis as the Cossacks were firmly anti-Catholic.
While most Orthodox bishops in the Polish–Lithuanian Commonwealth supported the Union of Brest, as with the previousFlorentine Union, not all of them accepted the union. Someeparchies (dioceses) continued to give their loyalty to Constantinople. These dissenters had no ecclesiastical leaders but withPetro Konashevych-Sahaidachny — theHetman of theZaporozhian Cossacks — they had a secular leader who was opposed to the union with Rome. The Cossacks' strong historic allegiance to the Eastern Orthodox Church put them at odds with the Catholic-dominated Commonwealth. Tensions increased when Commonwealth policies turned from relative tolerance to the suppression of the Orthodox church, making the Cossacks strongly anti-Catholic. By that time, the loyalty of the Zaporozhian hetmanate to the Commonwealth was only nominal. In August 1620, the Hetman prevailed uponTheophanes III — theGreek Orthodox Patriarch of Jerusalem — to re-establish an Orthodox metropolis in the realm. Theophanes consecratedJob Boretsky as the new "Metropolitan of Kiev, Galicia and all Ruthenia" and as the "Exarch of Ukraine". There were now two metropolitans with the same title but different ecclesiastical loyalties within the Commonwealth.
By 1686, Russia had complete sovereignty over the lands of theZaporozhian Sich andleft-bank Ukraine, as well as the city of Kiev. TheEternal Peace Treaty of 1686 which was concluded by Russia and the Commonwealth affirmed this reality.[4] As a result, the Greek Catholic population in those areas suffered oppression and many deaths. It also spelled an end to the independence and unity of the Hetman state. TheStarodub, Chernihiv, and other territories in left-bank Ukraine went to Russia; the rest remained in the Commonwealth.
The end of the Commonwealth came with thepartitions of Poland when theRussian Empire, theKingdom of Prussia and theHabsburg monarchy divided the realm between them. Following the partitions, its successor states treated the Uniate Church differently:
The below is a list of metropolitans of "Kiev, Galicia and all Ruthenia":[6]