Union of Brest

This article is about the 1596 transfer of religious jurisdiction from Constantinople to Rome in the Polish-Lithuanian Commonwealth. For the medical condition, see Symmastia.
Religious situation in the Polish–Lithuanian Commonwealth in 1573

The Union of Brest[a] took place in 1595–1596 and represented an agreement by Eastern Orthodox Churches in the Ruthenian portions of the Polish–Lithuanian Commonwealth to accept the Pope's authority while maintaining Eastern Orthodox liturgical practices, leading to the formation of the Ruthenian Uniate Church, which currently exists as the Ukrainian Greek Catholic Church and the Belarusian Greek Catholic Church.
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