why is a book a symbol for saint peter apostle - SERP Analysis

https://www.archspm.org/what-are-the-symbols-of-st-peter-the-apostle/

https://en.wikipedia.org/wiki/Saint_Peter

https://www.reddit.com/r/Catholicism/comments/16e92r9/why_is_st_peters_cross_an_antichristian_symbol/

https://www.facebook.com/groups/866118310598275/posts/1813032912573472/

https://en.wikipedia.org/wiki/Cross_of_Saint_Peter

https://www.nationalgallery.org.uk/paintings/learn-about-art/paintings-in-depth/painting-saints/recognising-saints-objects/recognising-saints-keys

https://www.quora.com/What-is-the-purpose-of-the-Cross-of-Saint-Peter

https://www.christianiconography.info/peter.html

https://christianity.stackexchange.com/questions/39180/when-did-the-upside-down-cross-become-a-symbol-of-anti-christianity