The O2 Arena (visually typeset in branding as The O2 arena, referred to as North Greenwich Arena in 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, England. It is named after its main sponsor, the telecommunications company O2. With a capacity of up to 20,000[2] depending on the event, it is second-largest arena in the UK (after the Manchester Arena) and one of the largest in Europe. In 2008, The O2 Arena took the crown of the world's busiest music arena from the Manchester Arena, a title which it had held since 2001.[4] The closest underground station to the venue is the North Greenwich station on the Jubilee line.