Old Catholic Church -- Biography : The Pope and the professor : Pius IX, Ignaz von Döllinger, and the quandary of the modern age / Thomas Albert Howard
2017
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Old Catholic Church -- Doctrines : Met het oog op morgen : Opstellen over taal, taalverandering en standaardtaal / Joop van der Horst
2010
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Old Catholic Church -- History : Old Catholic and Philippine independent ecclesiologies in history : the Catholic Church in every place / by Peter-Ben Smit
2011
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Old Catholic Church -- History -- 19th century : Catholics without Rome : Old Catholics, Eastern Orthodox, Anglicans, and the reunion negotiations of the 1870s / Bryn Geffert and LeRoy Boerneke
