This chapter explores three sets of claims about the combined social and spatial structures of Palladio’s salon and piano nobilePiano nobile, Le Corbusier’s promenade architecturalePromenade architecturale and Eisenman’s post-functionalistPost-functionalist program. The first set of claims is found in I Quattro LibriI Quattro Libri dell’Architettura (The Four Books of Architecture) Dell’Architettura, where Palladio describes the social principles—associated with control, connection and centrality—shaping his country villa plans. This chapter measures the properties of the piano nobili of 10 of Palladio’s villas and tests them against three hypotheses (H1.1–H1.3). The second set of claims is derived from scholarly interpretations of Le Corbusier’s promenade architecturalePromenade architecturale and its position in the planning of his villas. To examine these arguments, the plans of five of Le Corbusier’s purist, white villas are measured and tested against three hypotheses (H2.1–H2.3). Finally, two hypotheses (H3.1–H3.2) about deliberation in the plans of five of Peter Eisenman’s numbered series of houses are examined. The goal is to explore how Eisenman’s designs can accommodate domestic programs despite being designed without this intent. The socio-spatial evaluation in this chapter is undertaken usingJustified Plan Graph (JPG) analysis Justified Plan Graph (JPG) analysis.