citizens as the original race was moved to 25 August due to transfer from Siena's VIII Corps, and the second was on 23 September for the inauguration of the monument to Giuseppe Garibaldi. A third Palio, the "Palio of Peace", was held in 1945 by popular acclaim to celebrate the end of World War II and was won by Gioacchino Calabro riding Rubacuori su Folco, for the contrada of Drago (Dragon). An extraordinary Palio was held in 1969 to commemorate the landing on the moon by the Apollo 11 mission. After 1945 the habit of running extraordinary palios to mark important centenaries emerged. A palio was held on 28 May 1950 to celebrate the five hundredth anniversary of the canonization of Saint Bernardine of Siena. On 5 June 1961 an extraordinary palio marked the centenary of unification. The most recent centenary palio, held on 20 October 2018, commemorated the ending of the First World War in 1918. Victories per contrada Controversy and equine security measures For several years, the Palio has been the focus of numerous protests by animal-rights organizations, including the Anti-Vivisection League. Concerns include primarily race incidents causing falls, which in some cases have led to horses' deaths. In 2011, these concerns resulted in Italy's tourism minister blocking the Palio from being nominated for listing in the UNESCO Intangible Cultural Heritage Lists. The results of calculations on the percentage of accidents caused by the Palio vary depending on who makes them. According to the Anti-Vivisection League, a total of 48 horses have died from 1970 to 2007, an average of one dead horse per year. However, the calculations carried out by supporters of the Palio for the same period, which include all the tests held before the real race, give a rate of 2.05% of fatal accidents per ride. Many rules governing the protection of animals have been developed and implemented only since the 1990s; supporters of the Palio stress that injuries have been drastically reduced since then. In recent decades, the city of Siena has adopted a series of measures to ensure the protection of horses (and riders) before, during and after the race, but these measures are still judged insufficient by some animal welfare groups, who continue to seek abolition of the race. Among the measures taken include: A compulsory health check held by a commission appointed by the City Council and consisting of two surgeons