The Nikonian Liturgical Reforms

Nikon became Patriarch of Moscow in 1652 already convinced that centuries of hand copying and local variation had let Russian liturgical practice drift away from authentic Greek Orthodoxy, the church from which Rus had originally received Christianity in 988. With the strong support of Tsar Alexis, he ordered new service books printed to match contemporary Greek and Kyivan exemplars rather than the older Muscovite texts, and he pressed a set of ritual changes into universal use: the three-finger sign of the cross in place of the traditional two-finger gesture, the spelling Iisus rather than Isus for the name of Jesus, a changed number of prosphora loaves used in the liturgy, and a reversal in the direction certain processions moved around the church.

Resistance from clergy and laity who considered the older forms not merely customary but doctrinally bound up with salvation itself led Nikon and his successors to seek formal conciliar backing. Councils held in Moscow in 1666 and 1667, attended by visiting Greek and other Eastern patriarchs alongside the Russian bishops, approved the reformed texts and rites as the only legitimate standard and went further than simply correcting practice, pronouncing anathema against the old rite itself and against anyone who continued to use it, treating the older forms as a heresy rather than merely a local custom to be phased out gently.

Archpriest Avvakum Petrov became the most prominent public resister of the reforms, exiled repeatedly for his refusal to accept the new service books and eventually burned at the stake in 1682 for continuing to preach against them. His example encouraged clergy and laypeople across Russia who had come to see the two-finger sign of the cross and the older printed texts as inseparable from the faith itself, not as neutral matters of custom the church could adjust at will.

Communities of resisters fled Moscow's reach into the far north, into Siberia, and eventually beyond Russia's borders entirely, and some priestless groups facing forced conversion by state authorities chose mass self-immolation rather than compliance, a grim episode of the schism's early decades. The resistance split further into two broad camps: the popovtsy, priestly Old Believers who eventually secured their own bishops and maintained a full sacramental hierarchy, and the bezpopovtsy, priestless Old Believers who concluded that ordained priesthood itself had failed entirely with the reforms and built communities without clergy at all. State persecution of Old Believers continued through the Russian Empire until a 1905 toleration edict finally lifted most legal restrictions, and the Moscow Patriarchate itself did not formally revoke the 1666 and 1667 anathemas against the old rite until 1971, nearly three centuries after Nikon's program began.