the religious group which experienced the most dramatic decline since the end of the Russian Empire and throughout the Soviet Union. In the final years of the empire they constituted 10% of the population of Russia, while today their number has shrunk to far less than 1% and there are few descendants of Old Believers' families who feel a cultural link with the faith of their ancestors. Catholicism Catholicism was the religion of 140,000 Russian citizens, about 0.1% of the total population, in 2012. They are concentrated in Western Russia with numbers ranging between 0.1% and 0.7% in most of the federal subjects of that region. The number of "ethnic Catholics" in Russia, that is to say Poles and Germans, and smaller minorities, is continually declining due to deaths, emigration, and secularisation. At the same time there has been a discrete rise of ethnic Russian converts to the Catholic Church. The Archdiocese of Moscow administers the Latin Rite of the Catholic Church in Russia. Further suffragan bishoprics exist in Irkutsk, Novosibirsk and Saratov. The Diocese of Irkutsk is in fact the largest Catholic bishopric on earth, covering an area of 9,960,000 squared kilometres. Almost all Russian Catholics adhere to the Latin Rite. However, the Catholic Church recognises the extremely small Russian Greek Catholic Church as a Byzantine Rite church sui juris ("of its own jurisdiction") in full communion with the Catholic Church. Protestantism and Other Christians Various denominations of Protestantism, both historical and Evangelical, as well as Pentecostalism, were the religion of 0.2% (300,000) of the population of Russia in 2012. Their number was slightly more than 1% only in Tuva (1.8%), Udmurtia (1.4%) and the Altai Republic (1%). Lutheranism has been on a continuous decline among Finnish and German ethnic minorities, while it has seen some Russian converts, so that some traditionally Finnish churches, like the Evangelical Lutheran Church of Ingria, today have more Russian than Finnish believers. Adventists, Baptists, Methodists and Pentecostals are of relatively recent introduction, having at most 120 years of history in Russia. People who considered themselves Christians without affiliation to any church or denomination formed 4.1% (5,900,000) of the population, with numbers ranging between 1% to 8% in most of Russia's federal subjects, and over 8% only in Nenetia (14%), North Ossetia–Alania (10%), Tver Oblast (9%) and the Jewish Autonomous Oblast (9%). Jehovah's Witnesses were estimated to have 255,000 believers in Russia in the