Religion in Ukraine
As of 2018, according to a survey held by the Razumkov Center, 71.7% of the total respondents declared to be believers, while 11.5% were uncertain whether they believed or not, 5.3% were uninterested in beliefs, 4.7% were unbelievers, 3.0% were atheists, and a further 3.7% found it difficult to answer the question. A 2018 survey conducted by the Razumkov Centre found that 71.7% of the population declared themselves believers. About 67.3% of the population declared adherence to one or another strand of Orthodox Christianity (28.7% of the Kiev Patriarchate, 23.4% just Orthodox, 12.8% of the Moscow Patriarchate, 0.3% Ukrainian Autocephalous Orthodox Church, and 1.9% other types of Orthodoxy), 7.7% just Christians, 9.4% Greek Rite Catholics, 2.2% Protestants and 0.8% Latin Rite Catholics. Judaism was the religion of the 0.4%; while Buddhism, Paganism and Hinduism were each the religions of 0.1% of the population. A further 11.0% declared themselves non-religious or unaffiliated.
History of Christianity in Ukraine
In the Union of Brest of 1596 (colloquially known as "unia"), a part of the Ukrainian Church was accepted under the jurisdiction of the Roman Pope, becoming a Byzantine Rite Catholic Church, a Ukrainian Greek Catholic Church, colloquially known as the Uniate Church. While the new church gained many faithful among the Ukrainians in Galicia, the majority of Ukrainians in the rest of the lands remained within Eastern Orthodoxy with the church affairs ruled by then from Kiev under the metropolitan Peter Mogila "(Petro Mogyla)". The Orthodox Church was made illegal (its legality was partially restored in 1607), its property confiscated, and Orthodox believers faced persecution and discrimination which became an important reason for large numbers of Ukrainians to emigrate to Tsardom of Russia following the Union. The eastward spread of the Union of Brest led to violent clashes, for example, assassination of the Greek Catholic Archbishop Josaphat Kuntsevych by the Orthodox mob in Vitebsk in 1623.