Oktoberfest 2010, Munich, Germany

Crown Prince Ludwig, later to become King Ludwig I, was married to Princess Therese of Saxe-Hildburghausen on October 12,1810. The citizens of Munich were invited to attend the festivities held on the fields in front of the city gates to celebrate the happy royal event. The fields were named Theresienwiese ("Theresa's meadow") in honor of the Crown Princess, and have kept that name ever since, although the locals have since abbreviated the name simply to the "Wies'n".
Horse races in the presence of the Royal Family marked the close of the event that was celebrated as a festival for the whole of Bavaria. The decision to repeat the horse races in the subsequent year gave rise to the tradition of the Oktoberfest.
"The festival was eventually prolonged and moved ahead to September to allow for better weather conditions. Today, the last day of the festival is the first Sunday in October. In 2006, the Oktoberfest extended two extra days because the first Tuesday, October 3, was a national holiday. Over the past 200 years, Oktoberfest was canceled 24 times due to cholera epidemics and war."