Hint 1:
Check out the cryptex on the photo from 1500. 

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Hint 2:
The cryptex is opened. What's the combination?

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Hint 3:
You can translate symbols into letters. 

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Hint 4:
The cross symbol is X. What if the symbols are arranged like an alphabet? 

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Hint 5:
Count all the letters starting with X. The first letter in the code will be A (the beginning of the new alphabet loop).

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Answer:
APPLE

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