Carl Olof Rosenius was a Swedish lay preacher, author and editor of the monthly Pietisten from 1842 to 1868. He was one of the country's most widely-heard preachers of his day and has been described as being of "extraordinary importance for the low-church evangelical revival not only in Sweden but also in the other Nordic countries".

Paul Petter Waldenström was a Swedish lecturer, priest in the Church of Sweden and theologian, member of the Riksdag, and writer, who became the most prominent leader of the free church movement in late 19th-century Sweden.