I'm at the Bank of Zurich, in front of nine security boxes. Which is the box of James Joyce and how do I know his code?

To know which box you are looking for, remember that James Joyce mentions "the box in the number of the Triskelion ...".

To locate your code and open the safe, remember that Leonardo Pisano reveals the sequence in his book Liber Abaci.

Tip: Search the internet for Leonardo Fibonacci and the "Fibonacci number"