Thick Particular: Architecture as a Relational Entity in Armstrong's Ontology

Contemporary architectural discourse frequently treats the built object as a singular, context-independent entity—a tendency that, this paper argues, constitutes an ontological error. Drawing on D.M. Armstrong’s realist metaphysics, the paper proposes the concept of the thick particular as a corrective framework for understanding architectural existence. On this account, an architectural work is not merely a physical object but an entity constituted by a network of programmatic, contextual, temporal, collective, data-driven, and material-historical relations—relations that are not external additions but intrinsic to what the work is. Through conceptual analysis and the purposive selection of five case studies—Seattle Central Library, Parc de la Villette, Markthal Rotterdam, Prostho Museum Research Center, and CCTV Headquarters—the paper develops a seven-dimensional thickening framework and tests its discriminatory power. The analysis demonstrates that realist ontological frameworks, which have been largely unexplored in architecture theory, offer precise tools for distinguishing relationally constituted works from those whose iconic form suppresses or marginalises relational dimensions. The framework is advanced as a diagnostic and generative tool for practitioners committed to architecturally meaningful production.