This volume fundamentally revises our understanding of the development of modern New York, focusing on elite domestic architecture within the contexts of social history, urban planning, architecture, interior design, and adaptive reuse. Featuring new archival research and previously unpublished photographs and architectural plans, contributions from emerging and establishing scholars, art historians and practitioners offer a multi-faceted analysis of major figures such as James B. Duke, Horace Trumbauer, Julian Francis Abele, Robert Venturi, and Richard Kelly, with fresh perspectives on domestic spaces, urban forms, and social reforms that shaped early-twentieth century New York into the modern city we know today.