The Millennium Stadium, known since 2016 as the Principality Stadium for sponsorship reasons, is located in the heart of Cardiff, the capital of Wales, United Kingdom. With a seating capacity of over 74,000, it is the second-largest stadium in the world with a fully retractable roof. Opened in June 1999, the stadium was constructed to host the 1999 Rugby World Cup. It has since become an iconic venue for various sports, including rugby union, rugby league, and football, as well as for major events such as concerts. The stadium's design includes a unique feature: its four distinctive masts, which are crucial to the functionality of the retractable roof. The arena also prides itself on its pitch, which is removable and can be retracted to expose a secondary surface, allowing the venue to be multipurpose without compromising the quality of the playing area. The Millennium Stadium offers visitors a state-of-the-art experience with its high-tech facilities, creating a fantastic atmosphere during events, often described as unparalleled by sports enthusiasts.