Emperor Constantine and the Marriage of the Church to the State

If you have any suggestions leave them in the comments below!

Links to peruse at your leisure.

https://www.thecollector.com/constantine-great-conversion-christianity/
https://www.thecollector.com/elagabalus/
https://www.britannica.com/biography/Elagabalus
https://penelope.uchicago.edu/Thayer/E/Roman/Texts/Cassius_Dio/80*.html
https://www.britannica.com/topic/list-of-Roman-emperors-2043294
https://www.crf-usa.org/bill-of-rights-in-action/bria-13-4-b-religious-tolerance-and-persecution-in-the-roman-empire
https://www.crf-usa.org/bill-of-rights-in-action/bria-13-4-b-religious-tolerance-and-persecution-in-the-roman-empire
https://worldpopulationreview.com/country-rankings/most-christian-countries
https://www.history.com/news/inside-the-conversion-tactics-of-the-early-christian-church
https://sourcebooks.fordham.edu/source/edict-milan.asp
https://www.forumancientcoins.com/dougsmith/feac39cri.html
https://rpl.hds.harvard.edu/faq/catholicism-france
https://www.britannica.com/event/Reconquista
https://www.britannica.com/place/Germany/Religion
https://www.britannica.com/topic/Church-of-England
https://www.history.com/news/henry-viii-divorce-reformation-catholic-church
https://www.britannica.com/biography/Saint-Anthony-of-Egypt

You can't read this book online but this is an excellent book on the Christian roots of America that is certainly worth a read.
https://www.amazon.com/Faith-Freedom-Christian-American-Liberty/dp/0929510046