In 1971 the Moscow Patriarchate revoked the anathemas placed on the Old Believers in the 17th century, but most Old Believer communities have not returned to Communion with other Orthodox Christians. Estimates place the total number of Old Believers remaining today at from 1 to 10 millions, some living in extremely isolated communities in places to which they fled centuries ago to avoid persecution. One Old-Believer parish in the United States has entered into communion with the Russian Orthodox Church Outside Russia. Old-Believer churches in Russia currently have started restoration of their property, although Old Believers (unlike the nearly-official mainstream Orthodoxy) face many difficulties in claiming their restitution rights for their churches. Moscow has churches for all the most important Old Believer branches: Rogozhskaya Zastava (Popovtsy of the Belokrinitskaya hierarchy official center), a cathedral for the Novozybkovskaya hierarchy in Zamoskvorech'ye and Preobrazhenskaya Zastava where Pomortsy and Fedoseevtsy coexist.