National Cultural Heritage Agency of Netherlands / Document No. 356, Photographer A. J. van der Wal, Digitally Enhanced, http://creativecommons.org/licenses/by-sa/3.0/
National Museum of Denmark, Digitally Enhanced
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The Holy Sacrifice of the Mass: The Perpetual Sacrifice of the Catholic Church by Josef Merk
BALaT Licensed under CC BY 4.0 KIK-IRPA, Brussels (Belgium), cliché X046988] https://creativecommons.org/licenses/by/4.0/ https://balat.kikirpa.be/copyright/copyright_en-GB.php Digitally Enhanced
National Cultural Heritage Agency of Netherlands / Interbellum_0285, Digitally Enhanced, http://creativecommons.org/licenses/by-sa/3.0/
National Cultural Heritage Agency of Netherlands / Interbellum_0270, Photographer Sjaan van der Jagt, Digitally Enhanced, http://creativecommons.org/licenses/by-sa/3.0/
The Means of Grace: A Complete Exposition of the Seven Sacraments, 1821-1896
Public Domain
National Museum of Denmark, Digitally Enhanced
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National Museum of Denmark, Digitally Enhanced
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Royal Museum of Fine Arts Antwerp
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National Museum of Denmark, Digitally Enhanced
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RISD, Attribution to Creative Commons http://creativecommons.org/publicdomain/mark/1.0/
BALaT Licensed under CC BY 4.0 KIK-IRPA, Brussels (Belgium), cliché X002748] https://creativecommons.org/licenses/by/4.0/ https://balat.kikirpa.be/copyright/copyright_en-GB.php Digitally Enhanced
Europeana, Attribution to creative Commons, https://creativecommons.org/licenses/by/3.0/ Digitally Enhanced