BALaT. Licensed under CC BY 4.0 KIK-IRPA, Brussels (Belgium), photo X006555], https://creativecommons.org/licenses/by/4.0/, https://balat.kikirpa.be/copyright/copyright_en-GB.php. Digitally enhanced
BALaT. Licensed under CC BY 4.0 KIK-IRPA, Brussels (Belgium), photo X003573], https://creativecommons.org/licenses/by/4.0/, https://balat.kikirpa.be/copyright/copyright_en-GB.php. Digitally enhanced
National Heritage Institute. No. inventory 8182/216, licensed under (CC BY-SA 4.0) https://creativecommons.org/licenses/by-sa/4.0/. Digitally enhanced.
The Magazine of Christian Art; an illustrated monthly magazine devoted to current church building, American and foreign, and the allied ecclesiological arts, with expert discussions of all topics relating to Christian archaeology. 1907. public domain.
Christian Art. vol.04, year 1908. \"In conjunction with the German Society for Christian Art published by the Society for Christian Art, GmbH\". Public Domain.
Christian Art. vol.04, 1908. “In Conjunction with the German Society for Christian Art published by the Society for Christian Art, GmbH.”
Public Domain