Built in 1903, the 12-story building at 27 West 67th Street is the oldest of eight that comprise the West 67th Street Artists’ Colony Historic District. The studio buildings–which now find themselves next to Central Park, Lincoln Center, and the Time Warner Center on the Upper West Side–were built by a group of artists to provide live/work space on what was then a block of ramshackle stables. Asking $4,950,000, this graceful pre-war duplex is as much an important part of New York City history as it is creative and cool. The stylishly renovated three-bedroom co-op was, until 2007, the residence of graphic designer Milton Glaser, creator of the “I ♥ NY” campaign among other iconic designs and co-founder of “New York” magazine. Another unusual thing about this pretty property: It comes with an additional room on the building’s top floor, perfect for a gym, home office–or artist’s studio.