Florence, the explosion of the wagon

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The wagon in the shape of a 3-storey tower is towed around the city by two oxen to the Piazza del Duomo, where the Archbishop lights up a dove-shaped rocket from the altar, the "colombina" through a rope runs through the nave of the cathedral until you get to the cart placed outside making all the fireworks burst inside it, so the "colombina" continues its journey going back through the nave.