The Palio di Siena is a horse race held twice each year, on 2 July and 16 August, in Siena, Italy. Ten horses and riders, bareback and dressed in the appropriate colours, represent ten of the seventeen contrade, or city wards, in a tradition dating back to the 17th century. The Palio held on 2 July is named Palio di Provenzano, in honour of the Madonna of Provenzano, a Marian devotion particular to Siena which developed around an icon from the Terzo Camollia area of the city. The Palio held on 16 August is named Palio dell'Assunta, in honour of the Assumption of Mary.