Prada “Epicenter,” New York. Designed by OMA/Rem Koolhaas, 2001. Prada invested $40 million in its 23,000-square-foot New York flagship “epicenter,” a massive space even by New York standards. The bulk of the structure, however, is left bare, without merchandise. Take the monumental wooden curve: more a skateboarder’s quarter-pipe than retail space, it is an expression of Prada’s minimalist aesthetic.