O'Neill Building
BUILDING IN MANHATTAN, NEW YORK, UNITED STATES
655 Sixth Avenue
The O'Neill Building is a landmarked former department store, located at 655-671 Sixth Avenue between West 20th and 21st Streets in the Flatiron District neighborhood of Manhattan, New York City. The building was originally Hugh O'Neill's Dry Goods Store, and was designed by Mortimer C.