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Barcelona Pavilion, Mies' renowned structure, exemplifies his architectural principles of simplicity, clarity, and functionality. Built for the 1929 International Exposition, the pavilion showcased Mies' innovative use of glass, steel, and marble. Its open plan, flowing spaces, and minimal ornamentation reflect his belief in "less is more." The pavilion's iconic design and enduring influence make it a testament to Mies' architectural legacy.