and legal obligations. The building of new Orthodox churches was strongly discouraged. The Catholics were strictly forbidden to convert to Orthodoxy, and the marriages between Catholics and Orthodox were frowned upon. Orthodox subjects had been increasingly barred from high offices of state. Union of Brest and its aftermath In order to oppose such restrictions and to reverse cultural polonization of Orthodox bishops, the Ecumenical Patriarch encouraged the activity of the Orthodox urban communities called the "brotherhoods" (bratstvo). In 1589 Hedeon Balaban, the bishop of Lviv, asked the Pope to take him under his protection, because he was exasperated by the struggle with urban communities and the Ecumenical Patriarch. He was followed by the bishops of Lutsk, Cholm, and Turov in 1590. In the following years, the bishops of Volodymyr-Volynskyy and Przemyśl and the Metropolitan of Kyiv announced their secession from the Ecumenical Patriarchate of Constantinople, which was increasingly influenced by the Ottomans. In 1595 some representatives of this group arrived to Rome and asked Pope Clement VIII to take them under his jurisdiction and unite them to the Apostolic See of Saint Peter. 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 Kyiv under the metropolitan Petro Mohyla. 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. Khmelnytsky Uprising As the unia continued its expansion into Ukraine, its unpopularity grew, particularly in the southern steppes where Dnieper Cossacks lived. The Cossacks, who valued their traditions and culture, saw the unia as a final step of Polonization. As a result, they reacted by becoming fierce proponents of Orthodoxy. Such feelings played a role in the mass uprising whose targets included