Siena's Palio Horse Race

SIENA, ITALY - AUGUST 14: (RESTRICTED TO EDITORIAL USE - NO MARKETING NO ADVERTISING CAMPAIGNS) Horsemen ride in the second rehearsal for the Palio also called Prova on August 13, 2013 in Siena, Italy. The so-called Tratta, in which the ten horses are allocated to the varying city districts or contrada is a precursor to the Palio di Siena, a twice annual summer event, in which riders representing city districts compete, in a tradition that dates back to 1656. (Photo by Chris Jablinski/Getty Images) (Photo by Chris Jablinski/Getty Images)