The Russian Orthodox Church and the State

The Russian Orthodox Church, established as a patriarchate in 1589 in Moscow, has maintained a historically close relationship with the Russian state. Under Patriarch Kirill, who has been the head of the Russian Orthodox Church since February 1, 2009, the Church emphasized civilizational unity among East Slavic peoples. Since Russia’s full-scale invasion of Ukraine in 2022, the Church’s public statements have attracted significant international attention. This includes a blessing and prayer given by Patriarch Kirill for Russian military personnel in Ukraine. He also condemned LGBTQ+ people and declared a Holy War against the West. Interpretations of his words vary: Some analysts note alignment with state narratives, while others consider them expressions of religious support within a pastoral context.

“May the Lord protect the Russian land. When I say ‘Russian,’ I am using an ancient expression from ‘The Tale of Bygone Years’: ‘Where the Russian land takes its beginning,’ referring to the Russian land, which now includes Russia, Ukraine, Belarus, and other tribes and peoples.” – Patriarch Kirill

Early Origins of Orthodoxy

One of the first large Slavic states was Kyivan Rus, made up of several East Europe, Norse, and Finnic states with its capital in Kyiv, Ukraine. The Christianization of Kyivan Rus in 988 CE under Prince Vladimir the Great marked a foundational moment for Eastern Orthodoxy in Europe. With the adoption of Byzantine Christianity, Kyiv became the primary religious and cultural center for East Slavic peoples, maintaining strong ties to Constantinople. The Metropolitan of Kyiv held the highest ecclesiastical authority, overseeing an Orthodox Christian realm with closely intertwined religious and political leadership. During its formative years, Kyiv acted as both a spiritual and administrative center. However, the fragmentation of Kyivan Rus and the Mongol invasions in 1237 weakened this unity and gradually diminished Kyiv’s influence. As political power shifted northward between the 13th and 15^th centuries, it allowed Moscow to position itself as the successor to Kyiv’s religious legacy, initiating a long-term competition over Orthodox authority.

The Rise of Moscow as an Ecclesiastical Center

During the 15^th and 16^th centuries, Moscow consolidated political authority and developed the concept of the “Third Rome” in the early 16^th century, portraying itself as the successor to ancient Rome and to Constantinople’s after the fall of the latter in 1453. This idea supported the growing influence of Moscow within Orthodox Christianity. In 1589, the Russian Orthodox Church further strengthened its position and aligned itself with the Muscovite state and reinforced its ecclesiastical authority. This development contributed to a shift from Kyiv’s historical prominence to Moscow, creating overlapping claims to religious heritage between the two traditions and informing subsequent debates regarding ecclesiastical jurisdiction.

Annexation of the Kyiv Metropolis by the Moscow Patriarchate

A pivotal institutional shift was the 1686 transfer of the Kyiv Metropolis from the Ecumenical Patriarchate of Constantinople to the Moscow Patriarchate. This shift happened due to the expanding power of the Russian Tsardom and the weakening political influence of the Ecumenical Patriarchate of Constantinople which enabled Moscow to consolidate religious power over Ukrainian Orthodox institutions. Debate continues over the canonical and long-term implications of this event, which in practice placed the Ukrainian ecclesiastical structure under Moscow’s authority. This promoted administrative centralization within the Orthodox Church. At the same time, local religious traditions in Ukrainian territories persisted, showcasing diversity within the broader Orthodox framework.

Imperial Integration and Church-State Relations

After the formation of the Russian Empire in 1721, church governance was reorganized. Peter the Great reorganized the patriarchate through the Holy Synod, placing the Russian Orthodox Church under direct state supervision. The Church became integrated into imperial administrative and educational institutions. Ukrainian ecclesiastical institutions were incorporated into this system, but regional religious identities and practices persisted. Throughout the 18th and 19th centuries, Orthodox governance balanced unity and diversity. The Russian Empire’s ecclesiastical administration shaped this process. Regional traditions, liturgical practices, and local religious identities continued to influence Orthodox life. Orthodox administration thus reflected both imperial centralization and local variation.

Post-Soviet Religious Revival and Fragmentation

The dissolution of the Soviet Union in 1991 led to a revival of religious life after decades of state-mandated atheism. In Ukraine, this resulted in the emergence of multiple Orthodox jurisdictions. The Ukrainian Orthodox Church under the Moscow Patriarchate, established in 1990, maintained canonical recognition within global Orthodoxy but operated in a politically sensitive environment. At the same time, independent ecclesiastical movements sought to establish an autocephalous Ukrainian church. These parallel structures reflected broader debates over national identity, sovereignty, and religious authority in a post-Soviet context. During the 1990s and 2000s, unresolved jurisdictional issues contributed to further divergence between Ukraine and Russia such as ecclesiastical authority disputes, parish affiliation, and control of major religious sites like the Kyiv-Pechersk Lavra.

War and Ecclesiastical Reconfiguration

Ecclesiastical tensions increased after the 2014 annexation of Crimea and Russia’s partial invasion of the Donbas. This intensified further with the 2022 full-scale invasion of Ukraine. During this period, religious affiliation became closely linked to political alignment. In 2019, the Orthodox Church of Ukraine was granted autocephaly by the Ecumenical Patriarchate of Constantinople, formally altering ecclesiastical authority. However, this decision faced disputed recognition across global Orthodoxy, and interpretations of canonical legitimacy varied. Ukrainian authorities also increased scrutiny of religious institutions with external affiliations, prompting gradual shifts in parish alignment and organizational structures.

Russian-Aligned Churches and State Investigation

Russian-aligned Orthodox institutions in Ukraine, mainly the Ukrainian Orthodox Church of the Moscow Patriarchate (UOC-MP), have been investigated on grounds of national security since 2022. The UOC-MP has a large parish network, but only about 2-5% of Ukrainians identify with it. This stands in contrast to around 50% who identify with the Orthodox Church of Ukraine. Based on alleged ties to the Russian Orthodox Church and fears of pro-Kremlin activity, Ukrainian authorities have carried out raids and taken legal actions. Since 2025, over 180 cases have been opened against UOC-MP priests for treason and other pro-Russian affiliation. These actions have prompted the United Nations Human Rights Office to express concerns about the protection of religious freedom.

Leadership Transition and Continuing Development

Leadership and jurisdictional changes have shaped the evolution of Orthodox institutions in Ukraine and Russia for centuries. Patriarch Filaret (1929-2026) played a significant role in advocating for ecclesiastical independence in Ukraine during the post-Soviet period and in supporting the formation of independent church structures. Following his death, the Orthodox Church of Ukraine continued to develop under its established leadership framework after the 2018 autocephaly decision. These developments reflect an ongoing process of institutional adaptation rather than a single definitive break. The broader relationship between Ukrainian and Russian Orthodoxy continues to develop, shaped by historical legacies, varying interpretations of ecclesiastical authority, and changes in the political landscape.