Top photo : pisa 's tourist-magnet leaning tower was in danger of leaning all the way over , until some clever engineering straightened it up a little .
顶部照片：吸引众多游客的比萨斜塔曾经一度面临倾斜过度的威胁，好在一些聪明的工程师稍稍加固了一点。
Pisa was retaken by the florentine republic only in 1509 , during a military campaign in which machiavelli played a political role .
