Russian Orthodox Church separated from Ecumenical Patriarchate of Constantinople
Autocephaly and schism
During the reign of Tsar Fyodor I, his brother-in-law, Boris Godunov, contacted the Ecumenical Patriarch of Constantinople, who "was much embarrassed for want of funds".Several years after the Council of Pereyaslav (1654) that heralded the subsequent incorporation of eastern regions of the Polish–Lithuanian Commonwealth into the Tsardom of Russia, the see of the Metropolitan of Kiev and all Rus' was transferred to the Moscow Patriarchate (1686).Expansion
In the aftermath of the Treaty of Pereyaslav, the Ottomans (supposedly acting on behalf of the Russian regent Sophia Alekseyevna) pressured the Patriarch of Constantinople into transferring the Metropolitan of Kiev and all Rus' from the jurisdiction of Constantinople to that of Moscow. The handover brought millions of faithful and half a dozen dioceses under the ultimate administrative care of the Patriarch of Moscow and all Rus' (and later of the Holy Synod of Russia), leading to the significant Ukrainian presence in the Russian Church, which continued well into the 18th century, with Theophan Prokopovich, Epiphanius Slavinetsky, Stephen Yavorsky and Demetrius of Rostov being among the most notable representatives of this trend. The exact terms and conditions of the handover of the Kiev Metropolis are a contested issue.In 1700, after Patriarch Adrian's death, Peter the Great prevented a successor from being named, and in 1721, following the advice of Theophan Prokopovich, Archbishop of Pskov, the Holy and Supreme Synod was established under Archbishop Stephen Yavorsky to govern the church instead of a single primate. This was the situation until shortly after the Russian Revolution of 1917, at which time the Local Council (more than half of its members being lay persons) adopted the decision to restore the Patriarchate. On 5 November (according to the Julian calendar) a new patriarch, Tikhon, was named through casting lots.
The late 18th century saw the rise of starchestvo under Paisiy Velichkovsky and his disciples at the Optina Monastery. This marked a beginning of a significant spiritual revival in the Russian Church after a lengthy period of modernization, personified by such figures as Demetrius of Rostov and Platon of Moscow. Aleksey Khomyakov, Ivan Kireevsky and other lay theologians with Slavophile leanings elaborated some key concepts of the renovated Orthodox doctrine, including that of sobornost. The resurgence of Eastern Orthodoxy was reflected in Russian literature, an example is the figure of Starets Zosima in Fyodor Dostoyevsky's Brothers Karamazov.
In the Russian Orthodox Church, the clergy, over time, formed a hereditary caste of priests. Marrying outside of these priestly families was strictly forbidden; indeed, some bishops did not even tolerate their clergy marrying outside of the priestly families of their diocese.