Planned and designed by the largest group of American Postwar architects and planners to ever collaborate on a single project, Lincoln Center for the Performing Arts is an internationally renowned performing arts center boasting a cohesive ensemble of Formalist, International-Style and Brutalist buildings constructed between 1958 and 1969. Intent on bringing international recognition to this highly significant complex, Landmark West!, an Upper West Side preservation advocacy organization, commissioned Gregory to get it listed on the National Register of Historic Places under the supervision of two Mid-Century Modern scholars. Although the property was ultimately denied listing on the National Register due to owner objection, the Nomination not only provided the basis for Gregory's graduate thesis in Historic Preservation and Real Estate Development at Columbia University, but also became a vital resource for its sponsor and the various consultants who have worked on Lincoln Center's preservation.