Built on principles of integrity, innovation and profitability, Citadel Realty Services, LLC is a standout among NYC real estate problem solvers company. Citadel was founded in 1962 by Seymour Shapiro, who, among other things, successfully facilitated the construction of landmark properties, including New York’s Lincoln Center, Peter Cooper Village and Stuyvesant Town, as well as academic buildings at Columbia University, and luxury residential buildings on the Upper East Side.