Roman Maria Jakub Próchniewski

Roman Maria Jakub Próchniewski was the Prime Bishop of the Mariavite Old Catholic Church from 1945 to 1953.
He graduated from the Saint Petersburg Roman Catholic Theological Academy. He served as a professor at the Theological Seminary in Lublin and, from 1903, as the provincial leader for Mariavites in the Lublin district. In 1906, he became the parish priest of the Mariavite parish in Płock. From the chapter in 1907, he was the vicar general. He was consecrated as a bishop on September 4, 1910, in Łowicz. He was a confessor of Maria Franciszka Kozłowska, the founder of the Mariavite movement, and the author of theological and Mariavite-themed articles. From 1945 to 1953, he served as the Prime Bishop of the Mariavite Old Catholic Church. He wrote a book about Maria Franciszka Kozłowska titled Żywot Przeczystej Pani i objawione jej Dzieło Wielkiego Miłosierdzia. He was the main consecrator of Bishop Zygmunt Szypold who became the head of the Polish Old Catholic Church.

Episcopal genealogy

His episcopal genealogy is as follows:

Roman Catholic Church

Old Catholic Church of the Netherlands

Old Catholic Church

Mariavite Church