The start of the second rehearsal for the Palio known as the Prova on August 14, 2013 in Siena. 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.
{"Image ImageDescription": "SIENA, ITALY - AUGUST 14: (RESTRICTED TO EDITORIAL USE - NO MARKETING NO ADVERTISING CAMPAIGNS) The start of the second rehearsal for the Palio known as the Prova on August 14, 2013 in Siena. 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)", "Image Copyright": "2013 Chris Jablinski"}