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Millennium Dome

Original name of a large dome-shaped building in South East London, England

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In a 2005 report, the cost of the Dome and surrounding land (which increased to 170 acres from the initial offering of the 48 acres enclosed by the Dome) and managing the Dome until the deal was closed was £28.7 million. The value of the 48 acres occupied by the Dome was estimated at £48 million, which could have been realised by demolishing the structure, but it was considered preferable to preserve the Dome. The structure itself still exists and serves as the exterior to The O2 entertainment complex, which includes the O2 Arena.

The Prime Meridian passes the western edge of the Dome and the nearest London Underground station is North Greenwich on the Jubilee line.

Architecture

The dome is one of the largest of its type in the world. Externally, it appears as a large white marquee with twelve 100-metre-high (330 ft) yellow support towers, one for each month of the year, or each hour of the clock face, representing the role played by Greenwich Mean Time. In plan view it is circular, 365 metres (1,200 ft) (one metre or 39 inches for each day in a standard year) in diameter. It has become one of the United Kingdom's most recognisable landmarks, and can be easily identified on satellite images of London.

The architect was Richard Rogers and the contractor was a joint venture company, McAlpine/Laing Joint Venture (MLJV) formed between Sir Robert McAlpine and Laing Management. The building structure was engineered by Buro Happold, and the entire roof structure weighs less than the air contained within the building. Although referred to as a dome it is "not a dome in the structural sense [...] In this building, a dome-shaped cable network is supported on a ring of [...] masts". It has been disparagingly referred to as the Millennium Tent.

The canopy is 52 metres (170 ft) high in the middle – one metre (3.3 ft) for each week of the year and is made of durable and weather-resistant PTFE-coated glass fibre fabric panels (original plans to use PVC-coated polyester fabric were dropped after protest led by Greenpeace), with each of the 72 segments containing two panels. Its symmetry is interrupted by a hole through which a ventilation shaft from the Blackwall Tunnel rises. Six segments were destroyed during Storm Eunice on 18 February 2022.

Built in 15 months, the dome structure was delivered under budget, at a cost of £43m.

The critic Jonathan Meades has scathingly referred to the Millennium Dome as a "Museum of Toxic Waste", and apart from the dome itself, the project included the reclamation of the entire Greenwich Peninsula. The land was previously derelict and contaminated by toxic sludge from East Greenwich Gas Works that operated from 1889 to 1985. The clean-up operation was seen by the then Deputy Prime Minister Michael Heseltine as an investment that would add a large area of useful land to the crowded capital.

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