The Scoppio del Carro "Explosion of the Cart" is a folk tradition of Florence.
On the morning of Easter Sunday, the 30-foot-tall antique cart moves through Piazza del Duomo. Hauled by white oxen adorned with garlands of the first flowers and herbs of spring, the cart is escorted by 150 soldiers, musicians, and people in 15th-century costumes. Meanwhile, a fire is struck using the historic flint from Jerusalem at Chiesa degli Santi Apostoli. It is then carried in procession to the cathedral square by members of the Pazzi family.
The cart is loaded with fireworks while a wire, stretching to the high altar inside the cathedral, is fitted with a mechanical dove (the "Colombina"). At the singing of the Easter Mass, the cardinal of Florence lights a fuse in the Colombina with the Easter fire. It then speeds through the church to ignite the cart outside.
The bells of Giotto ring throughout and the fireworks last about 20 minutes. A successful display of the "Explosion of the Cart" symbolizes good harvest, stable civic life, and good business.