1) Certain tuscan 2) Fibonacci 3) Fibonacci by birth 4) Fibonacci notably 5) Galileo 6) Galileo by birth 7) Galileo, notably 8) Guide at the Leaning Tower 9) His campanile is out of plumb 10) Leaning Tower city resident 11) Like galileo 12) Many a Tuscan 13) Resident on the Arno 14) The Arno crosses his city