© Grant Smith
The Millennium Dome was designed and built between 1996 and 1999 to house the Millennium Experience exhibition. The idea was the outcome of an interaction between the designers, Imagination, and the architects, Richard Rogers. It was then taken up by the engineers at Buro Happold, who developed the concept of the tensioned fabric-and-cable roof. The structure has now become the icon for the millennium celebrations in London. (Ian Liddell)