Really disappointed, after seeing other sites in Tuscany. There is the tower, the Piazza, and an EMPTY duomo, as all the art were lost as the Pisans lost a war to the Florentines(?). Now it's just a tourist strip selling souvenirs, and thousands of stupid American tourists taking pictures leaning towards the tower. Better plan the day to spend four hours in Luca (on the train from Florence), and just one hour in Pisa, and go right back to Florence.