Ruthenian Orthodox Church to the Union of Brest The Ruthenian Greek Catholic Church was created with the
Union of Brest in 1595/1596, yet its roots go back to the
Christianization of Kievan Rus'.
Byzantine missionaries exercised decisive influence in the area. The 9th-century mission of
Saints Cyril and Methodius in
Great Moravia had particular importance as their work allowed the spread of worship in the
Old Church Slavonic language. The Byzantine-Greek influence continued, particularly with the official adoption of Byzantine rites by Prince
Vladimir I of Kiev in 988 when the
metropolis of Kiev within the
Ecumenical Patriarch of Constantinople was established. Later at the time of the
Great Schism (), the church took sides and remained
Orthodox. Following the
devastating Mongol invasions and the sack of Kiev in 1240, Metropolitan
Maximos moved to the town of
Vladimir-on-Klyazma in 1299. In 1303, at the request of the Ruthenian kings of the
Kingdom of Galicia–Volhynia, Patriarch
Athanasius I of Constantinople created the separate
metropolis of Halych which included the western parishes of the original metropolis of Kiev. The new metropolis did not last for long (inconsistently throughout most of the 14th century), and its new metropolitan,
Peter of Moscow, was consecrated as the metropolitan of Kiev, rather than the metropolitan of Halych. Just before his death, Peter moved his episcopal see from Vladimir to Moscow. During his reign, the
Metropolitanate of Lithuania was established in the
Grand Duchy of Lithuania, while the metropolis of Halych was also re-established after his death. In 1445, the metropolitan
Isidore, with his see in Moscow, joined the
Council of Florence and became the
papal legate for all Ruthenia and Lithuania. After Isidore suffered prosecution by the local bishops and royalty of the
Grand Principality of Moscow, he was exiled from Moscow, while a council of Russian bishops appointed their own metropolitan,
Jonah of Moscow, without the consent of the
Ecumenical Patriarch of Constantinople, leading to the independence of the
Russian Orthodox Church in 1448. For this reason, Patriarch
Gregory III of Constantinople reorganized the Ruthenian Church in the
Polish–Lithuanian Commonwealth. Its new primates were styled "
Metropolitans of Kiev, Galicia and all Ruthenia". He appointed
Gregory II Bulgarian as the new Greek Catholic primate, who rejoined the
Ecumenical Patriarch of Constantinople under
Dionysius I of Constantinople in 1470.
From the Union of Brest to the Partitions of Poland This situation continued for some time, and in the intervening years what is now western and central Ukraine came under the rule of the
Polish–Lithuanian Commonwealth. The Polish king
Sigismund III Vasa was heavily influenced by the ideals of the
Counter-Reformation and wanted to increase the Catholic presence in Ukraine. While the clergy of the Ruthenian lands were technically ruled from Constantinople, the Ruthenian Orthodox bishops were appointed by the Polish Catholic monarch, often with disastrous results. In the Eparchy of Volodymyr, for example, two different lay noblemen were both appointed as bishop by the Polish king. Both "bishops" hired mercenaries and fought a pitched battle over control of the Eparchy, before the Polish king finally stepped in and appointed one of the two candidates to an adjacent Orthodox See. Meanwhile, the religious renewal caused by the Counter-Reformation among Latin Catholics in Poland and Lithuania drew the envy of Orthodox clergy. With the encouragement of the
Society of Jesus, four bishops of the Ruthenian Church signed the
Union of Brest in 1595, broke from the
Ecumenical Patriarchate of Constantinople, and reunited with the
Catholic Church under the authority of the
Holy See, while continuing to say the
Byzantine Rite in
Old Church Slavonic. The Union of Brest was also motivated by outrage over the insult to the Primacy of the See of Kiev implicit in the recent promotion of the See of Moscow to
a patriarchate by
Jeremias II of Constantinople. In 1596, the Ruthenian bishops finalized their agreement with the Holy See. Following that, both churches existed legally in the
Polish–Lithuanian Commonwealth with Metropolitans of Kyiv, one,
Josyf Veliamyn Rutsky, Greek Catholic, and another,
Peter Mogila, Orthodox. Following the Union of Brest, the new Greek Catholic church was widely supported by both the Ukrainian clergy and local Christians. According to Ludvik Nemec, the creation of the Uniate church was a turning point for the development of Ukrainian national awareness – the separation from Russian-dominated Orthodoxy made the Ukrainian population more aware of the linguistic and cultural differences from Russia, and the Ukrainian identity started to sharply develop in the 16th and 17th century. Following the 1809
Treaty of Schönbrunn, the Austrian Empire was forced to cede most of the territory of the former West Galicia to the
Duchy of Warsaw. In 1815, the final decision of
Congress of Vienna resulted in the cession of West Galicia to the
Russian Empire. The diocese of Chelm, which was located in West Galicia, ended up under the Russian jurisdiction. The Russian emperor
Pavel I of Russia restored the Uniate church, which was reorganized with three eparchies suffragan to metropolitan bishop Joasaphat Bulhak. The church was allowed to function without restraint (calling its adherents
Basilians). The clergy soon split into pro-Catholic and pro-Russian, however, with the former tending to convert to Latin Catholicism, while the latter group, led by Bishop
Iosif Semashko (1798–1868) and firmly rejected by the ruling Greek-Catholic synod remained largely controlled by the pro-Polish clergy with the Russian authorities largely refusing to interfere. Following the
Congress of Vienna, the Russian Empire occupied so-called
West Galicia (formerly in Austrian Poland) and, temporarily,
Tarnopol district, where a separate metropolitan of Galicia was established between 1809 and 1815. The territory of Kholm eparchy along with Central Polish territories became part of
Congress Poland. The situation changed abruptly following Russia's successful suppression of the
1831 Polish uprising, aimed at overthrowing Russian control of the Polish territories. As the uprising was actively supported by the Greek-Catholic church, a crackdown on the Church occurred immediately. The pro-Latin members of the synod were removed; and the Church began to disintegrate, with its parishes in Volhynia reverting to Orthodoxy, including the 1833 transfer of the famous
Pochaiv Lavra. In 1839 the
Synod of Polotsk (in modern-day Belarus), under the leadership of
Bishop Semashko, dissolved the Greek-Catholic church in the
Russian Empire, and all its property was transferred to the Orthodox state church. The 1913 Catholic Encyclopedia says that, in what was then known as 'Little Russia' (now
Ukraine), the pressure of the Russian Government "utterly wiped out" Greek Catholicism, and "some 7,000,000 of the Uniats there were compelled, partly by force and partly by deception, to become part of the Greek Orthodox Church". By the end of the century, those remaining faithful to this church began emigrating to the U.S., Canada, and Brazil due to persecution by the Orthodox Church and the Russian Empire, e.g. the
Pratulin Martyrs. Despite being once the majority religion in Ukraine, In the absence of a significant culturally and politically active
native nobility (although there was considerable overlap, with more than half of the clerical families also being of petty noble origin), and enjoying a virtual monopoly on education and wealth within western Ukrainian society, the clergy came to form that group's native aristocracy. The clergy adopted Austria's role for them as bringers of culture and education to the Ukrainian countryside. Most Ukrainian social and political movements in Austrian-controlled territory emerged or were highly influenced by the clergy themselves or by their children. This influence was so great that western Ukrainians were accused by their Polish rivals of wanting to create a theocracy in western Ukraine. The territory received by Austria in the partition of Poland included
Galicia (modern western Ukraine and southern Poland). Here the Greek-Catholic Ruthenian (Ukrainian) peasantry had been largely under Polish Catholic domination. The Austrians granted equal freedom of worship to the Greek-Catholic Church and removed Polish influence. They also mandated that Uniate seminarians receive a formal higher education (previously, priests had been educated informally by their fathers), and organized institutions in
Vienna and
Lviv that would serve this function. This led to the appearance, for the first time, of a large, educated class within the Ukrainian population in Galicia. It also engendered a fierce sense of loyalty to the Habsburg dynasty. When Polish rebels briefly took control of Lviv in 1809, they demanded that the head of the Ukrainian Greek Catholic Church,
Antin Anhelovych, substitute
Napoleon's name in the
Divine Liturgy for that of Austrian Emperor
Francis I. Anhelovych refused, and was imprisoned. When the Austrians retook control over Lviv, Anhelovych was awarded the
cross of Leopold by the Emperor. As a result of the reforms, over the next century the Greek-Catholic Church in
Austrian Galicia ceased being a puppet of foreign interests and became the primary cultural force within the Ukrainian community. Most independent native Ukrainian cultural and political trends (such as Rusynophilia,
Russophilia and later
Ukrainophilia) emerged from within the ranks of the Greek-Catholic Church
clergy. The participation of Greek Catholic priests or their children in western Ukrainian cultural and political life was so great that western Ukrainians were accused of wanting to create a theocracy in western Ukraine by their Polish rivals.
The Church in the Russian Empire and the Soviet Union , Lviv 12.1927. Sitting: bp.
Hryhory Khomyshyn,
Metropolitan Archbishop Andrey Sheptytsky, bp.
Nykyta Budka, bp.
Josaphat Kotsylovsky. After
World War I, Ukrainian Greek Catholics found themselves under the governance of the nations of
Poland,
Hungary,
Romania and
Czechoslovakia. Under the previous century of Austrian rule, the Ukrainian Greek Catholic Church attained such a strong Ukrainian national character that in interwar Poland, the Greek Catholics of Galicia were seen by the nationalist Polish and Catholic state as even less patriotic than the Orthodox Volhynians. Extending its
Polonization policies to its
Eastern Territories, the Polish authorities sought to weaken the UGCC. In 1924, following a visit with Ukrainian Catholic believers in North America and western Europe, the head of the UGCC was initially denied reentry to Lwów (the Polish name at the time for Lviv), only being allowed back after a considerable delay. Polish Catholic priests, led by their Latin bishops, began missionary work among Greek Catholics; and administrative restrictions were placed on the Ukrainian Greek Catholic Church. After
World War II Ukrainian Catholics came under the rule of
Communist Poland and the hegemony of the
Soviet Union. With only a few clergy invited to attend, a synod was convened in Lviv, which revoked the Union of Brest. Officially all of the church property was transferred to the
Russian Orthodox Church under the
Moscow Patriarchate, Most of the Ukrainian Greek Catholic clergy went underground. This catacomb church was strongly supported by its
diaspora in the Western Hemisphere. Emigration to the U.S. and Canada, which had begun in the 1870s, increased after World War II. According to
Karel C. Berkhoff, during the
Nazi occupation of Ukraine, the treatment of Christian churches by German authorities varied from denomination to denomination. The Nazi authorities were friendly towards Ukrainian Protestants and treated them with "magnanimity", and were left unsuppressed; pacifist denominations were specifically favoured as well. Meanwhile, Greek and Latin Catholics were harshly persecuted, something that Berkhoff attributes to "Nazi hostility to the Vatican combined with hostility to the Poles, who in Ukraine constituted the vast majority of these Christians". The creation of the community in 1596 was discredited in publications, which went to great pains to try to prove the Church was conducting activities directed against Ukrainians in the first half of the 20th century. The exception was metropolitan
Yosyf Slipyi who, after 18 years of imprisonment and persecution, was released in 1963 thanks to the intervention of
Pope John XXIII. Slipyi took refuge in Rome, where he received the title of Major Archbishop of Lviv, and became a cardinal in 1965. , Ukraine The clergy who joined the Russian Orthodox Church were spared the large-scale persecution of religion that occurred elsewhere in the country (see
Religion in the Soviet Union). In the city of Lviv, only one church was closed (at a time when many cities in the rest of Ukraine did not have a working church). Moreover, the western dioceses of Lviv-Ternopil and Ivano-Frankivsk were the largest in the USSR and contained the majority of the Russian Orthodox Church's cloisters (particularly convents, of which there were seven in Ukrainian SSR but none in Russia). Orthodox canon law was also relaxed on the clergy allowing them to shave beards (a practice uncommon to Orthodoxy) and conduct liturgy in Ukrainian as opposed to
Church Slavonic. The Ukrainian Catholics continued to exist underground for decades and were the subject of vigorous attacks in the state media. The clergy gave up public exercise of their clerical duties, but secretly provided services for many lay people. ), with a jurisdiction roughly equivalent to that of a
patriarch in an Eastern church. This title has since passed to
Myroslav Ivan Lubachivsky in 1984 and thereafter to
Lubomyr Husar in 2000 and
Sviatoslav Shevchuk in 2011; this title has also been granted to the heads of three other
Eastern Catholic Churches. In 1968, when the Greek Catholic Church was legalized in
Czechoslovakia, a large-scale campaign was launched to harass recalcitrant clergy who remained illegal. The weakened Soviet authorities were unable to pacify the situation, and most of the parishes in Galicia came under the control of the Greek-Catholics during the events of a large scale inter-confessional rivalry that was often accompanied by violent clashes of the faithful provoked by their religious and political leadership. These tensions led to a rupture of relations between the
Moscow Patriarchate and the
Vatican.
Current situation in London.
Membership The Ukrainian Greek Catholic Church is the second largest Eastern Catholic Church in the world. As of 2022, it had approximately 4.2 million members. In
Ukraine, the UGCC is the second largest religious organization in terms of number of communities within the Catholic Church. The Ukrainian Greek Catholic Church has third most members in allegiance among the population of Ukraine after the
Ukrainian Orthodox Church (Moscow Patriarchate) and the
Orthodox Church of Ukraine. The Ukrainian Greek Catholic Church predominates in three western
oblasts of Ukraine, including the majority of the population of
Lviv, but constitutes a small minority elsewhere in the country. The church has followed the spread of the
Ukrainian diaspora and has some 40 hierarchs in over a dozen countries on four continents, including three other
metropolitan bishops in
Poland, the United States, and Canada. The Church in the diaspora including the United States and Canada is largely multi-ethnic. National surveys conducted since 2000 show that between 5.3% and 9.4% of Ukraine's total population are of the Ukrainian Greek Catholic Church. Worldwide, the faithful now number some 6 to 10 million, forming the second largest
particular Catholic Church, after the majority
Latin Church. According to a 2015 survey, followers of the Ukrainian Greek Catholic Church make up 8.1% of the total population (excluding Crimea) and form the majority in 3 oblasts: in Ukraine in 2017 •
Lviv Oblast — 59% of the population •
Ivano-Frankivsk Oblast — 57% •
Ternopil Oblast — 52%
Governance Most Ukrainian Catholic Churches have moved away from Church Slavonic; church services are mainly in the Ukrainian language. Many churches also offer liturgies in a country's vernacular (i.e. German in Germany or English in Canada). Some parishes continue to celebrate the liturgy in Slavonic even today, however, and services in a mix of languages are not unusual. In the early first decade of the 21st century, the major see of the Ukrainian Catholic Church was transferred to the Ukrainian capital of
Kyiv. The enthronement of the new head of the church Major Archbishop
Sviatoslav Shevchuk took place there on 27 March 2011 at the cathedral under construction on the left bank. On 18 August 2013, the
Patriarchal Cathedral of the Resurrection of Christ was dedicated and solemnly opened. On 5 July 2019,
Pope Francis declared to the church's leaders during a meeting in the Vatican "I hold you in my heart, and I pray for you, dear Ukrainian brothers." He also advocated greater humanitarian aid to Ukraine and warned the Church's Bishops to show "closeness" to their "faithful." It has used its social organisations, such as
Caritas Ukraine and
Caritas-Spes, to provide humanitarian assistance. Several leading prelates, including Major Archbishop
Sviatoslav Shevchuk, denounced the invasion and used their connections to the wider Catholic Church to gather support and provide information on the situation on the ground. Despite a few moments of tension between the leadership of the UGCC and Rome, namely over the inclusion of a Russian woman alongside a Ukrainian during the 2022 Good Friday Via Crucis, and the Pope's words regarding the assassination of
Darya Dugina, Shevchuk often emphasised Francis' support for Ukraine during the war. One of the major issues has been the targeting of the Church by Russian forces. Churches have been destroyed, and priests have had to evacuate sacred items to protect them from attacks. Additionally, Russian occupation authorities have banned the Ukrainian Greek Catholic Church and other Catholic ministries in the occupied regions of Ukraine, such as Zaporizhzhia. This includes organizations like the Knights of Columbus and Caritas. Church leaders have also been targeted for assassination. Major Archbishop Sviatoslav Shevchuk, head of the Ukrainian Greek Catholic Church, has had to move between safe houses to avoid threats. The ongoing conflict has led to significant damage and threats to the Ukrainian Greek Catholic Church and its members. Historical documents from the Soviet era have also shed light on the suppression of the Ukrainian Greek Catholic Church. These documents reveal the extent of Soviet efforts to eradicate the Church's influence in western Ukraine during the 1940s. The fate of the Crimean Exarchate of the Ukrainian Greek Catholic Church after the Russian occupation of the Crimean Peninsula has been particularly challenging. The local branches of the Church were labeled as "agents of foreign influence" and accused of spreading seditious ideas such as "Ukrainian nationalism" and "separatism." This led to significant restrictions and threats to the Church's activities in the region. Russian and pro-Russian militants in occupied territories have reportedly engaged in systematic persecution of non-Orthodox faiths, often under the guise of the Russian Orthodox Church. Incidents include the torture of detainees by individuals disguised as priests and the abduction of religious leaders such as Ihor Kozlovsky. These actions reflect a broader strategy of using religion to justify violence and exert control, tied to the Kremlin and Moscow Patriarchate's promotion of the "Russian World." Halya Coynash has criticized the Vatican for failing to address these abuses in its 2016 statement with Patriarch Kirill. The persecution extends to Catholic communities in occupied Ukraine, where Russian forces have intensified their crackdown on the Ukrainian Greek Catholic Church (UGCC). According to the Institute for Religious Freedom, Russian militants have closed UGCC churches in the Donetsk region, barring worshippers from entering, and have seized church properties since early 2024. Clergy have been expelled from occupied territories, leaving the UGCC without any clergy in Donetsk, Luhansk, Kherson, and Zaporizhzhia. Two UGCC priests, Fathers Ivan Levitsky and Bohdan Geleta, were detained in Berdyansk in November 2022 and remain in harsh conditions in Russian custody, facing severe mistreatment, including torture. In December 2022, Russian-installed authorities in Zaporizhzhia banned the UGCC and other Catholic groups, labeling them as extremist organizations. This aligns with a pattern of religious repression by Russian forces, who have reportedly damaged or destroyed over 660 religious sites since 2022. Archbishop Borys Gudziak noted that religious institutions in Russia function only if aligned with state policies, a practice now being enforced in occupied Ukrainian regions. In a 2025 interview,
Bishop Maksym Ryabukha, of the
Archiepiscopal Exharchate of Donetsk told pontifical charity
Aid to the Church in Need that "before the war we had over 80 parishes, and now we have only 37 active parishes. The rest were closed, occupied or destroyed." He went on to say that "the laws of the occupation force forbid any affiliation with the Catholic Church, either Greek-Catholic or Latin rite, and it is very difficult to provide any sort of ministry there. My exarchate no longer has any priests in these territories, all our churches have been destroyed, or they are closed and people are not allowed to attend them."
Calendar reform On 24 December 2022,
Major archbishop Sviatoslav handed over to
Metropolitan Epiphanius for review a letter outlining the considerations of the UGCC hierarchs regarding the , which aims to replace the use of the old
Julian calendar with the
Revised Julian calendar. The primates decided to create a joint working group on specific proposals for calendar reform. The joint group is initiated on the occasion of the celebration of the 1700th anniversary of the
First Ecumenical Council, held in
Nicaea in 325. In this
Council, in particular, the calendar principles of church life were determined. On 1–2 February 2023 in
Lviv-
Briukhovychi, the Synod of Bishops of the UGCC decided that from 1 September 2023, the Ukrainian Greek Catholic Church in Ukraine will switch to a new style (
Revised Julian calendar) for fixed holidays with the preservation of the current
Paschalion, which was announced by Supreme Archbishop
Sviatoslav on 6 February 2023. The calendar reform will have two stages. The first refers to all fixed holidays, and the second to the Easter date which would be kept in the old Julian. Parishes of the UGCC that are not ready to switch to the new style in 2023 have a transition period until 1 September 2025 to make the change. On 6 February 2023, the
Archeparchy of Przemyśl–Warsaw, taking into account the
previous decision of the Ukrainian Greek Catholic Church in Ukraine On 22 March 2023, the
Eparchy of Saints Peter and Paul of Melbourne, according to the decree of Bishop
Mykola Bychok, decided that from 1 September 2023, the UGCC in Australia and Oceania will completely switch to the Gregorian calendar, including
Easter. According to the decree of Bishop
Bohdan Dziurakh dated 22 April 2023, from 1 September 2023, the
Ukrainian Catholic Apostolic Exarchate of Germany and Scandinavia completely switches to the Gregorian calendar, including
Paschal, in contrast to the UGCC in Ukraine, in Poland. On 9 June 2023, the
Ukrainian Catholic Eparchy of the Holy Family of London, according to the decree of Bishop
Kenneth Nowakowski, switches from 1 September 2023 to the Gregorian calendar, in particular with Easter. ==Historic administrative division==