No. 65 Bleecker Street: Edelman’s protégé, Louis Sullivan, designed the terra-cotta-clad Bayard-Condict Building in 1897, one of city's first steel skeleton-frame skyscrapers (at 13 stories) and Sullivan's sole work in New York. Over the architect's objections, the angels were a belated addition at the request of the client.
Sullivan's celestial beings, by the way, predate by four years those on one of Vienna's most celebrated exemplars of Art Nouveau, Oscar Laske's "Angel Drugstore."
No. 561 Broadway: The steelwork of Ernest Flagg's Singer Building of 1902 expresses another attribute of Art Nouveau--flowing curvilinear forms.
Madison Square Park: Many authorities consider the meandrous relief by Augustus Saint-Gaudens on this pedestal (designed by Stanford White) as the first example of Art Nouveau in America. It was unveiled in 1880. On the left is Loyalty, on the right, Courage, and standing above them is a bronze Admiral Farragut (of "Damn the torpedoes" fame), also by Saint-Gaudens.
Saint-Gaudens distributed a hefty application of lettering on the monument, unprecedented at the time, and the font looks very Art Nouveau.
No. 132 West 89th Street: The Richard Rodgers School of the Arts and Technology went up in 1898, and though its overall style is Collegiate Gothic, the letters over the front door look distinctly Art Nouveau.
No. 2 West 64th Street: The New York Society for Ethical Culture Hall departed starkly from the prevailing building styles of its time, and architecture critics built it up as one of the best Art Nouveau buildings of the century. It was 1910 and the Art Nouveau movement was coming to an end.
No. 8220 Narrows Avenue, Bay Ridge, Brooklyn: The Howard E. and Jessie Jones House, with its sinuous pseudo-thatchery, is one of two examples in New York of the fairy-tale fantasy known as Black Forest Art Nouveau. As much Arts and Crafts as it is Nouveau (the styles are kissing cousins), the house was designed in 1916 by James Sarsfield Kennedy.
The Museum of Modern Art's Sculpture Garden: A 1900 entrance to the Paris Métro by Hector Guimard. To look at more organic design, visit: Rustic Architecture and Accoutrements in Central Park