Catholic Europeans and Hussites (and perhaps even orthodox and later protestants) maintained any beliefs or views regarding those inscriptions? Or they had purely heraldic and stylistic status? I believe intimidation might have a role in their use.
I read in a book about the Islamic Empire (i.e. Rashidun Caliphate) that muslim soldiers usually put verses from Qu'ran in their clothes and shields as some sort of "protective runes", and I believe vikings also had a similar concept. The Malinese slaves at "Revolta dos Malês" in portuguese-held Bahia all carried "Mandingas" with them; some sort of bag-pockets where they carried verses from the Qu'ran in pieces of paper, of whom they regarded to have some protective effect.
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