The O2

Coordinates: 51°30′10.14″N 0°0′11.22″E / 51.5028167°N 0.0031167°E / 51.5028167; 0.0031167

The O2, visually typeset in branding as The O2 arena, is a large entertainment district on the Greenwich peninsula in South East London, England, including an indoor arena, a music club, a Cineworld cinema, an exhibition space, piazzas, bars and restaurants. It was built largely within the former Millennium Dome, a large dome-shaped building built to house an exhibition celebrating the turn of the third millennium; as such, The Dome remains a name in common usage for the venue.

It is often referred by various names: the O2 Dome; the O2 Centre, which properly refers to an unrelated shopping centre on Finchley Road; or The O2 Arena, which properly refers to a smaller indoor arena within The O2. Naming rights to the district were purchased by the mobile telephone provider O2 from its developers, Anschutz Entertainment Group (AEG), during the development of the district. AEG owns the long-term lease on the O2 Arena and surrounding leisure space.

3Arena

The 3Arena is a 14,500-capacity amphitheatre located at North Wall Quay in the Dublin Docklands in Dublin, Ireland, which opened on 16 December 2008. It was built on the site of the former Point Theatre, a smaller music venue which operated from 1988–2007, retaining only some of the outer facade. The Point Theatre was branded as "The Point Depot", in recognition of its original role as a railway goods handling station.

From 2008 to 2014, the 3Arena was known as The O₂. Its 14,500 capacity makes it the largest indoor arena in Ireland. The venue was rebranded on 4 September 2014 as the 3Arena due to the takeover of O2 Ireland by Three Ireland.

The venue is owned by Live Nation. In 2011, the venue was named as the fifth busiest arena in the world with ticket sales of 670,000 putting it behind The O2 in London, the Manchester Arena, Antwerp's Sportpaleis and Melbourne's Rod Laver Arena.

Naming

Following its closure in 2007, the site underwent major redevelopment and was renamed The O₂ after the telecommunication brand, O2, similar to The O2 in London. In 2008 O2 paid €25 million for the naming rights for 10 years. Following the sale of mobile network operator O2 Ireland to rival 3 Ireland in June 2014, the venue was renamed as the 3Arena on 4 September 2014.