Horses of the Contrada of Unicorn, Eagle and Giraff fall down in the Casato curve during the Palio horseracing on July 2 in Siena. The Palio is a medieval horse race and pageant, which pits the ancient districts of Siena against each other in competition for the victory banner and in honor of the Virgin Mary. Animal rights group have often expressed their concern about the injuries and deaths of horses who frequently fall, collide, or are trampled during the race.