Great questions here. I would just replace the first one which doesn't seem very interesting imho. If someone click on a link to take a quiz about Florence, there are huge chances that they know where it is located (and it doesn't really bring info about the city).
Thank you to operatic training for the answers to two of these questions ("Andrei sul Ponte Vecchio, ma per buttarme in Arno..." from "O mio babbino caro" from "Gianni Schicchi")
For a week
The rest were educated guesses - in the case of Borgia/Medici a pure 50-50 guess.