| Roman Maria Jakub Próchniewski | |
| Birth Date: | 29 February 1872 |
| Birth Place: | Poland |
| Death Place: | Płock, Poland |
| Occupation: | Prime Bishop of the Mariavite Old Catholic Church |
| Church: | Mariavite Old Catholic Church |
| Consecration: | September 4, 1910 |
| Term Start: | 1945 |
| Term End: | 1953 |
| Predecessor: | Maria Filip Feldman |
| Successor: | Maria Bartłomiej Przysiecki |
| Bishop of the Mariavite Old Catholic Church | |
Roman Maria Jakub Próchniewski (February 29, 1872 in Congress Poland - February 13, 1954 in Płock, Poland) was the Prime Bishop of the Mariavite Old Catholic Church from 1945 to 1953.[1]
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.[1] 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.[1] 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 (Life of the Pure Lady and her Revealed Work of Great Mercy). He was the main consecrator of Bishop Zygmunt Szypold who became the head of the Polish Old Catholic Church.[2]
His episcopal genealogy is as follows:
Roman Catholic Church
Old Catholic Church of the Netherlands