Solovki prison camp
Some Old Believers have been received into communion with the Catholic Church as Eastern Catholics while maintaining their distinctive rites, thus making them Eastern Catholic equivalents of the Edinoverie. The most famous convert is Potapy Emelianov, a former Edinoverie priest in Luhansk Oblast, Ukraine. In 1918, he was received into the Russian Catholic Church with his entire parish. He later survived a ten-year sentence at Solovki prison camp and died in 1936. As of 2003, his cause for canonisation is open.