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https://www.newworldencyclopedia.org/entry/Anti-pope
new world encyclopediaantipope
https://alchetron.com/Antipope-Benedict-XIII
Benedict XIII, born Pedro Martnez de Luna y Prez de Gotor (25 November 1328 23 May 1423), known as el Papa Luna in Spanish, was an Aragonese nobleman, who is...
antipope benedict xiiialchetronfreesocialencyclopedia
https://en.wiktionary.org/wiki/antipope
free dictionaryantipopewiktionary
https://gutenberg.org/ebooks/author/51516
Project Gutenberg offers 77,735 free eBooks for Kindle, iPad, Nook, Android, and iPhone.
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https://en.wikipedia.org/wiki/Antipope_John_XXIII
antipope john xxiiiwikipedia
https://www.antipope.info/index.php
official websiteantipopeinfo