Leaning tower of....Bologna?

Pisa may have the famous leaning tower, but every city seams to have a couple. The two towers in the picture are in bologna. They are the two towers mentioned in Dante's Inferno. The shorter on leans 8 feet over. The picture was taken from the top of the scaffolding surrounding the Basilica do San Petronio. It is being renovated, and you can climb 15 stories to a lookout platform at the top of the scaffolding. It is the worlds 5th largest church by some measures. Towering 51 meters high it is imposing inside and out. http://en.m.wikipedia.org/wiki/San_Petronio_Basilica#_