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 entertainment complex on the Greenwich Peninsula in London. It is named after its primary sponsor, the telecommunications company O2.
The O2 Arena is the world's largest building by measure of floor space, and has the second-highest seating capacity of any indoor venue in the United Kingdom, behind the Manchester Arena, but took the crown of the world's busiest music arena from New York City's Madison Square Garden in 2008.
The O2 arena had the highest ticket sales in 2015, making it the biggest and most busy music arena in the world. It sold 1,819,487 tickets in 2015. It has hosted the worlds second largest event, coming only second to madison square garden in 1977. It has a maximum capacity of 20,000 with seating areas inside.