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 byThree 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.