What spanish tradition remembers Mary and Joseph's search for a place to sleep in Bethlem?

Las Posadas (Spanish for "the inns") is a nine-day celebration with origins in Spain beginning December 16 and ending December 24. It is a yearly tradition for many Catholic Mexicans and some other Latin Americans and symbolizes the trials which Mary and Joseph endured before finding a place to stay where Jesuscould be born, based on the passage in the New Testament, the Gospel of Luke (2:1-9). http://en.wikipedia.org/wiki/Las_Posadas