London's no-longer-extant Dome of Discovery welcomed some eight million visitors during the Festival of Britain in 1951. Photo courtesy CHELSEA Space.  Photo 1 of 5 in Prefab Icon: Dome of Discovery by Ralph Tubbs

Prefab Icon: Dome of Discovery by Ralph Tubbs1/5

London's no-longer-extant Dome of Discovery welcomed some eight million visitors during the Festival of Britain in 1951. Photo courtesy CHELSEA Space.