Which revolutionary retail store design concept, introduced in 2001, featured a transparent glass cube entrance leading to an underground store, later becoming an iconic architectural landmark?

The retail landscape has been transformed by architectural innovations that blend form and function. Some retail spaces have become iconic landmarks that define both shopping experiences and city skylines. This trivia challenges you to identify a groundbreaking architectural retail concept that revolutionized how brands present themselves to consumers, creating experiences that transcend traditional shopping.

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Apple's Fifth Avenue Store in New York City
PRADA's Epicenter in Tokyo by Herzog & de Meuron
Nike's House of Innovation in Paris
Louis Vuitton's Flagship Store in Singapore (Marina Bay)