Which iconic building's marketing campaign first introduced the concept of 'vertical retail' that revolutionized shopping mall architecture in the early 2000s?

In the world of architecture, marketing campaigns can transform buildings from mere structures into global icons. Some architectural projects have leveraged brilliant marketing strategies that permanently altered public perception and cultural significance. Test your knowledge of how famous architectural works were marketed and positioned in the public consciousness through innovative campaigns.

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Time Warner Center (New York)
Burj Khalifa (Dubai)
ION Orchard (Singapore)
The Shard (London)