Which innovative building product, first used in the Crystal Palace at the Great Exhibition of 1851, revolutionized architecture by allowing for unprecedented spans and transparency?

Test your knowledge about how building product development has evolved in architecture throughout history. Many architectural breakthroughs were made possible by innovations in building materials and products. This trivia explores a key turning point in architectural product development that revolutionized the industry and enabled entirely new building forms.

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Sheet glass and cast iron framework
Reinforced concrete
Structural steel I-beams
Prefabricated timber framing