O2 Arena may refer to:
The O2 Arena, referred to as North Greenwich Arena in the context of the 2012 Summer Olympics and 2012 Summer Paralympics, is a multi-purpose indoor arena located in the centre of The O2, a large entertainment complex on the Greenwich Peninsula in London. It is named after its main sponsor, the telecommunications company O2.
The O2 Arena has the second-highest seating capacity of any indoor venue in the UK, behind the Manchester Arena, but took the crown of the world's busiest music arena from New York's Madison Square Garden in 2008. The closest underground station to the venue is the North Greenwich station on the Jubilee line.
Following the closure of the Millennium Experience at the end of 2000, the Millennium Dome was leased to Meridian Delta Ltd. in 2001, for redevelopment as an entertainment complex. This included plans for an indoor arena.
Construction of the arena started in 2003 and finished in 2007. After the interior of the dome had been largely cleared and before building work inside began, in December 2004, the dome was used as the main venue for the annual Crisis Open Christmas organised by the London-based homelessness charity Crisis.
O2 Arena (formerly Sazka Arena, stylised as O2 arena) is a multi-purpose arena, in Prague, Czech Republic. It is home to HC Sparta Prague of the Czech Extraliga and is the second-largest ice hockey arena in Europe.
It has hosted important sporting events such as the (European Athletics Indoor Championships, two Ice Hockey World Championships (2004, 2015), the Euroleague Final Four 2006, the World Floorball Championship, the Davis Cup finals, as well as a handful of NHL and KHL games, including the 2014 Gagarin Cup final. It can also host stage shows, such as concerts, and other large-scale events.
Visitor record held by Madonna concert in 2006, which was attended by 18 628 spectators. On September 6 and 7, 2006 Madonna performed there during her Confessions Tour. She performed again at the arena on November 7 and 8, 2015 as part of her Rebel Heart Tour.
In October 2008, the New York Rangers and Tampa Bay Lightning opened the 2008–09 NHL season at O2 Arena with two games. Two years later, the NHL returned, with the Boston Bruins and Phoenix Coyotes playing twice.