“Right to believe” by Fyodor Telkov, a Russian photographer, describes some religious communities of Old Believers.
They are a Russian religious movement that, starting from 1666-1667, took position against the Orthodox hierarchy's choices in their country, and eventually separated in sign of protest against Patriarch Nikon's ecclesiastical Reforms. The Old Believers kept the Russian Church's old practices before the new reforms became effective, and would not re-enter the official Orthodox Church again.
"We, by grace received from the Holy and enlivening Spirit, agree, in regard to the Saints and devoted Fathers, to emend the errors introduced by the false knowledge of a few, so as the righteous order of the holy Orthodox Church might be rigorously and permanently maintained"