Yaqui Holy Week is both ritualistic and dramaturgic in its celebrations. The rituals date back to the early seventeenth century, at the time of pioneering Jesuit priest. The major event of the Yaqui Indians during Holy Week occurs on Wednesday evening in which people arrive at the church on horseback and begin to crawl and dance naked on the floor. Light begins to go out and people begin the whipping, screaming and crying to the sound of traditional music of sacrifice. In Tucson, dancers are used to wear dark coats and black hide masks, instead of blankets.