On the map, Florence (Firenze, in Italian) doesn’t seem to be a big city, and it isn’t. The size is only about 10×10 km. Do you know people can walk 5 km per hour on average? So within a day, you should be able to finish the whole city. But taking the time to climb the 278 ft bell tower at the Piazza del Duomo is a different story, even though it’s no comparison to the Cologne Cathedral (471 ft) as we had done it before.
The Piazza del Duomo is the center of the city and most tourists flock over there, in addition to a few famous museums including the Accademia Gallery which houses Michelangelo’s David. It happened to be a cultural week when we were at Rome/Florence. So there’s no need to pay for entering all national museums. However, you WILL have to pay for the “reservation” (for a few euros each person) in order to bypass the long, long, long waiting line of people without “reservation”. Another way to get you, huh?