Which famous architect famously endorsed and exclusively used Pittsburgh Plate Glass (PPG) in his designs, leading to the company naming their headquarters after him?

Throughout history, renowned architects have occasionally endorsed specific building products or materials that became synonymous with their design philosophy. These endorsements sometimes transformed niche products into industry standards and influenced architectural trends for decades. Test your knowledge about these famous architectural product endorsements that shaped the industry!

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Frank Lloyd Wright
Philip Johnson
I.M. Pei
Mies van der Rohe