Catholic people were told that if they prayed at holy places called shrines, they could be forgiven their sins or be cured of illnesses. This is why people took the risk of going on pilgrimages.
They relied on the Olmec tribe or society.
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Answer: Apparently, There is written record that a somebody named “Ahlers” knew of the Franks” hiding spot and how they had gone into hiding. Ahlers reportedly told his older brother, Cas, that he had betrayed the Franks during the war.