Ivrea is a little town about an hour from Torino.
In days of old, when the lord of the principality still had the "Right of First Night," a miller's daughter decided she wasn't going to give herself up. So she killed the lord and a battle ensued in which the locals fought the dead-lord's knights with rocks.
Hundreds of years later, the locals still celebrate. But instead of rocks, they use blood oranges.
The town has several neighborhoods that do battle with each other. Some man the town squares while some go from square to square in horse-drawn carts.
After seven days of this, one team is selected as the winner for the bravado they displayed.