I found this excellent text and story of St. Louis, King of France, who truly was a Catholic King. The text comes from 1875 (public domain). You can read more from Mary Seymour here:

https://www.google.com/books/edition/...

The following image was used by Open License:

https://commons.wikimedia.org/wiki/Fi...

The following image was used by Creative Commons license:

https://commons.wikimedia.org/wiki/Fi...

English: Crown of Thorns in the circular reliquary in crystal of 1896. Notre-Dame de Paris cathedral.
Français : La Couronne d'Épines dans le reliquaire circulaire en cristal de 1896. Cathédrale Notre-Dame de Paris.
Gavigan 2007 non_restricted

All other images are in the public domain.

Music is from the following:

Folk Round by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/...

Source: http://incompetech.com/music/royalty-...

Artist: http://incompetech.com/