Transylvania backed by the mobilization of Romanian troops, proclaimed Union with Romania on 1 December 1918. The "Proclamation of Union" of Alba Iulia was adopted by the Deputies of the Romanians from Transylvania, and supported one month later by the vote of the Deputies of the Saxons from Transylvania. The national holiday of Romania, the Great Union Day (also called "Unification Day") occurring on December 1, celebrates this event. The holiday was established after the Romanian Revolution, and marks the unification not only of Transylvania, but also of the provinces of Banat, Bessarabia and Bukovina with the Romanian Kingdom. These other
Transylvania Catholic, Lutheran, Reformed, and Unitarian branches. Other faiths also are present, including Jews and Muslims. Under the Habsburgs, Transylvania served as a place for "religious undesirables". People who arrived in Transylvania included those that did not conform to the Catholic Church and were sent here forcibly, as well as many religious refugees. Transylvania has a long history of religious tolerance. This has been ensured by its religious pluralism. Christianity is the largest religion in Transylvania. Transylvania has also been (and still is) a center for Christian denominations other than Eastern Orthodoxy, the form of Christianity that most Romanians follow. As