en.wikipedia.org
en.wikipedia.org
britannica.com
en.wikipedia.org
worldhistory.org
World History Encyclopedia
https://www.worldhistory.org › Holy_Roman_Empire
havefunwithhistory.com
Have Fun With History
https://www.havefunwithhistory.com › facts-about-the-holy-roman-empire
en.wikipedia.org
britannica.com
collaborate.princeton.edu
newworldencyclopedia.org
New World Encyclopedia
https://www.newworldencyclopedia.org › entry › Holy_Roman_Empire
courses.lumenlearning.com
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