Which architectural product innovation, first widely implemented in the 1950s, allowed for the creation of all-glass facades on skyscrapers by transferring the building load to the internal structure?

Modern architecture was transformed by innovative building products that changed how we design and construct. One particular innovation revolutionized commercial architecture in the mid-20th century, allowing for glass-dominated facades and forever changing our urban skylines. Test your knowledge about this pivotal architectural product development that helped birth the modern skyscraper aesthetic.

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Curtain wall systems
Structural glass blocks
Self-supporting glass panels
Tensile glass membranes