Universitätsbibliothek Heidelberg, Monthly magazine for all areas of Christian art and art studies as well as for the entire art life - 19.1922/1923. Public Domain
Universitätsbibliothek Heidelberg, Monthly magazine for all areas of Christian art and art studies as well as for the entire art life - 3.1906/1907. Public Domain
Universitätsbibliothek Heidelberg. Monthly magazine for all areas of Christian art and art studies as well as for the entire art life - 20.1923/1924. Public Domain
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BALaT, Licensed under CC BY 4.0 KIK-IRPA, Brussels (Belgium), cliché X003482] https://balat.kikirpa.be/copyright/copyright_en-GB.php, https://creativecommons.org/licenses/by/4.0/ Digitally Enhanced