The development of a skyscraper in New York City that will house Ken Griffin's Citadel is moving forward despite his feud with New York City Mayor Zohran Mamdani. The skyscraper project at 350 Park Avenue is being developed by Griffin's Citadel in partnership with Vornado Realty Trust and Rudin, and will see two of Griffin's firms being anchor tenants. "If you drive or walk past Park Avenue at 52nd Street, you will see that our 350 Park Avenue site is now under construction, actually under demolition. Mamdani spurred the controversy with an April 15 video the mayor recorded in front of Griffin's penthouse, calling him out as a wealthy hedge fund owner who would be subject to the new luxury property tax. NEW YORK'S WEALTHY RUSH TO AVOID MAMDANI'S SECOND-HOME TAX"When I ran for mayor, I said I was going to tax the rich.