Russian Byzantine Catholic Church

The Russian Greek Catholic Church (Russian: Российская греко-католическая церковь, Rossiyskaya greko-katolicheskaya tserkov) is a Byzantine Rite church sui juris in full union with the Catholic Church. Historically it represents the first reunion of members of the Russian Orthodox Church with the Roman Catholic Church. It is now in full communion with and subject to the authority of the Pope as defined by Eastern canon law. Russian Catholics historically had their own episcopal hierarchy (the Russian Catholic Apostolic Exarchate of Russia and the Russian Catholic Apostolic Exarchate of Harbin, China), however these offices are currently vacant; their few parishes are served by priests ordained in other Byzantine Catholic churches, former Orthodox priests, and Roman Catholic priests with bi-ritual faculties.

In Russia, it is purported that after the gradual development of the East-West Schism, a tiny group of Russian families maintained themselves as "Old Catholics" (rus: старокатолики (starokatoliki)), a name which should not be confused with the Döllingerite Old Catholic churches of Europe and the United States, which formally split with the Roman Catholic Church in the wake of the reforms of the First Vatican Council. The status of this group of Russian "Old Catholics", families and groups of individuals to whom the union with Rome remains essential and its relation to the current Russian Catholic Church is unclear.

The modern Russian Catholic Church owes much to the inspiration of poet and philosopher Vladimir Sergeyevich Solovyov (1853–1900), who urged, following Dante, that, just as the world needed the Tsar as a universal monarch, the Church needed the Pope of Rome as a universal ecclesial hierarch. Following Solovyov's teachings a Russian Orthodox priest, Nicholas Tolstoy, entered into full communion with the See of Rome under the Melkite Greek-Catholic, Byzantine Rite Patriarchate of Antioch. Solovyov received sacramental last holy communion from Father Tolstoy believing that in doing so he remained also a faithful member of the Russian Orthodox Church. Orthodox authorities refer to Tolstoy as an apostate and “ex-priest,” but tend to imply that Solovyov still died an Orthodox Christian. Nevertheless, Solovyov never retracted his sentiments in favor of union with the Catholic Church and the See of Rome, and to this day, many Russian Catholics refer to themselves as members of the 'Russian Orthodox Church in communion with Rome'.

...
Wikipedia