Old Believers or Old Ritualists are Eastern Orthodox Christians who maintain the liturgical and ritual practices of the Russian Orthodox Church as they were before the reforms of Patriarch Nikon of Moscow between 1652 and 1666. Resisting the accommodation of Russian piety to the contemporary forms of Greek Orthodox worship, these Christians were anathematized, together with their ritual, in a Synod of 1666–67, producing a division in Eastern Europe between the Old Believers and those who followed the state church in its condemnation of the Old Rite. Russian speakers refer to the schism itself as raskol (раскол), etymologically indicating a "cleaving-apart". In 1652, Nikon of Moscow, patriarch of the Russian Orthodox Church from then until 1658, introduced a number of ritual and textual revisions with the aim of achieving uniformity between the practices of the Russian and Greek Orthodox churches. Nikon, having noticed discrepancies between Russian and Greek rites and texts, ordered an adjustment of the Russian rites to align with the Greek ones of his time. In doing so, according to the Old Believers, Nikon acted without adequate consultation with the clergy and without gathering a council. After the implementation of these revisions, the Church anathematized and suppressed—with the support of Muscovite state power—the prior liturgical rite itself, as well as those who were reluctant to pass to the revised rite. Those who maintained fidelity to the existing rite endured severe persecutions from the end of the 17th century until the beginning of the 20th century as "Schismatics" (раскольники, raskol'niki). They became known as "Old Ritualists", a name introduced under the empress Catherine the Great, who reigned from 1762 to 1796. Those who adopted new liturgical practices started to call themselves pravoslavnye (Православные - those believing rightly). The installation of a Metropolitan of Kiev and All Russia, but resident in Moscow, by a council of Russian bishops in 1448 without consent from the Ecumenical Patriarch of Constantinople initiated the effective independence of the Eastern Orthodox Church in the Grand Duchy of Moscow.