The most exquisite holiday windows on Fifth Avenue might be inside the New York Public Library’s flagship building at the corner of 42nd Street in Manhattan. “Treasures,” the library’s first-ever permanent installation of highlights from its research collections, is an assemblage of approximately 250 objects spanning 4,000 years of history. Highlights include historic documents, such as medieval illuminated manuscripts, Shakespeare’s First Folio, a Gutenberg Bible, and a handwritten copy of the Declaration of Independence. Other items include a ballet slipper designed by Coco Chanel, the stuffed toys that inspired Winnie-the-Pooh, Virginia Woolf’s walking stick, and a painted ticket of Andy Warhol’s, among other prized items.