Which company first developed and patented curtain wall systems in the 1930s that revolutionized skyscraper design by separating the exterior cladding from the structural framework?

Frank Lloyd Wright once said, 'The mother art is architecture.' Behind every remarkable building stands a story of design innovation and engineering breakthroughs. This trivia explores a pivotal moment in architectural product design that revolutionized how we construct our skylines. Test your knowledge of the materials that shaped our modern architectural landscape!

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Alcoa (Aluminum Company of America)
Corning Glass Works
Bethlehem Steel Corporation
Pittsburgh Plate Glass Company (PPG)