Principality Stadium is a stadium with a documented history of combat-sports use. Depending on the organizer and event format, it has been used for professional fight cards, amateur competitions, grappling tournaments, weigh-ins, press events or related programming. The venue has also been known as Millennium Stadium. Its competition layout, spectator seating and operational setup can vary by event. The venue is relevant to the history of the promotions, federations, athletes and combat-sports events staged there.