 The second longest running pay-per-view event in history (behind WWE's WrestleMania), it is one of the promotion's original four pay-per-views, along with WrestleMania, Royal Rumble, and SummerSlam, dubbed the "Big Four".The event is traditionally characterized by having Survivor Series matches, which are tag team elimination matches that typically pits teams of four or five wrestlers against each other.The 2001 event was the fifteenth event in the Survivor Series chronology and included one 5-on-5 Survivor Series match, which was the main event, and was the first time in which the match had stakes attached to it.