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NEW YORK CITY — Zeckendorf Development, Eyal Ofer’s Global Holdings and Park Sixty LLC, an entity formed by Rafael and Ezra Nasser, are developing 520 Park Avenue, a 51-story residential tower in Manhattan. The development is located at East 60th Street between Park and Madison avenues on the Upper East Side. The property will feature 31 residences and 4,000 square feet of ground-floor retail. The building will be entirely clad in Indiana limestone articulated with French balconies and stone detailing evocative of New York apartment buildings in the 1920s and 1930s. Construction is slated for an early 2017 completion.