been to Bologna, it's a big busy city, beautiful, beautiful. I did see cyclists there, but what it is famous for are its gallerias, the sidewalks are all covered... and it's mostly done in shades of pink and orange.
I was in Siena in October and even then it was filled with cyclists from the USA and Canada. It is beautiful country and caters to bicycle tourists. It IS hilly though, and I saw some looks of terror as people rode across wet cobblestones..