From the webpage:
From February 5-9, 2018, libraries, archives, and other cultural institutions around the world are sharing free coloring sheets and books based on materials in their collections.
Something fun to start the week!
In addition to more than one hundred participating institutions, you can also find instructions for creating your own coloring pages.
Any of the images you find at Mardi Gras New Orleans will make great coloring pages (modulo non-commercial use and/or permissions as appropriate).
The same instructions will help you make “adult” coloring pages as well.
I wasn’t able to get attractive results for Pedro Berruguete Saint Dominic Presiding over an Auto-da-fe 1495 using the simple instructions but will continue to play with it.
High hopes for an Auto-da-fe coloring page. FBI leaders who violate the privacy of American citizens as the focal point. (There are honest, decent and valuable FBI agents, but like other groups, only the bad apples get the press.)