Theory-creation in architecture, which simultaneously engages with semantic, aesthetic, and functional domains, necessitates an epistemological foundation capable of clarifying the validity of architectural concepts, methods, and judgments. However, the epistemological underpinnings of theory-creation in architecture have persistently suffered from ambiguity. On one hand, many architectural theories rely on rational principles, the internal logic of form, stable rules, and critical reasoning. On the other hand, a significant portion of architectural understanding originates from lived experience, sensory perception, environmental embeddedness, and field observation. These two approaches—Rationalism and Empiricism—each propose different foundations for “how architectural knowledge is formed.” This has rendered the epistemological nature of architectural theory-creation, its validation criteria, and its mechanisms, a fundamental and unresolved problem. It remains unclear whether architectural theories rely more on a priori principles and rational argumentation, or on experientially derived perception and sensory evidence. This ambiguity challenges the methodological coherence of architectural research.
Elucidating the epistemological roots of architectural theory-creation making has gained particular significance in an era in which architecture confronts mounting environmental, technological, and social complexities. Clarifying the relationship between Rationalism and Empiricism can help redefine the position of theoretical reasoning alongside sensory experience, enabling the formation of more coherent frameworks in architectural education, criticism, and design. This endeavor not only enhances the theoretical precision and methodological rigor of architectural research, but also contributes to a better understanding of how ideas, models, and theories evolve within the discipline, thereby reducing its epistemological fragmentation.
The objective of this study is to elucidate the role of Rationalism and Empiricism in the formation of architectural knowledge by explicating the epistemological foundations of architectural theory-creation. Accordingly, this research seeks to analyze the mechanisms of producing and validating architectural theories from the perspective of both approaches. It aims to demonstrate how rational principles, a priori rules, and logical argumentation, on the one hand, and sensory perception, lived experience, and field observation, on the other, influence the process of architectural theory-creation. Furthermore, through a comparative framework, this study examines the strengths and limitations of each approach, ultimately aiming to pave the way for an integrated approach that could grant greater theoretical coherence to architectural discourse, and facilitate the development of more comprehensive theories in this field.
The research methodology of this paper is based on a qualitative-theoretical approach founded on comparative epistemological analysis. Following the collection and analysis of sources, the epistemological components influencing architectural theory-creation were extracted from the existing literature. Subsequently, four seminal theories by four selected theorists were chosen to enable the identification of structural differences and similarities in their modes of theory development. The theory-creation process of each thinker was then reconstructed using comparative analysis and description-interpretation. For this purpose, the epistemological components specific to each theory were first extracted from their texts, and subsequently categorized into recurring patterns. Finally, a conceptual model was developed to explain the epistemological foundations of theory-creation in architecture, encompassing both Rationalist and Empiricist approaches, and was validated through four components.
In the epistemological analysis of contemporary architecture, four prominent theories facilitate the examination of the connection among Rationalism, Empiricism, and phenomenological approaches: 1) Peter Eisenman’s “Formalism and Diagrammatism,” 2) Aldo Rossi’s “Typology and the City as Collective Memory,” 3) Christian Norberg-Schulz’s “Phenomenology of Place,” and 4) Juhani Pallasmaa’s “Embodied Architecture.” These four theories delineate a spectrum ranging from formal, analytical Rationalism to phenomenological Empiricism and embodied phenomenology. Analyzing their epistemological structure allows for understanding of the mechanisms of theory-creation in contemporary architecture.
Despite fundamental differences in their epistemological origins, these four theories exhibit several recurring patterns in the “knowledge-theory-creation” process. These patterns can be distilled into five categories: The first pattern, “the sourced nature of knowledge,” indicates that all four theorists—despite fundamental differences in their epistemological approaches—initiate the theory-creation process from a “primary epistemic core.” Eisenman introduces formal logic and the diagram as the primary source of theory; Rossi considers the stable structures of the city and type as the starting point; Norberg-Schulz bases theory on lived experience and the meaning of place; and Pallasmaa regards embodied perception as the source of theoretical knowledge. Thus, these theories share a common underlying structure: they first establish a “source of knowledge production” from which the entire theoretical apparatus is developed.
The second pattern, “organizing data or experience within a conceptual structure,” reveals that no theory—even a purely phenomenological one—develops without conceptual framing. Rossi reconstructs urban experience through rational typification; Norberg-Schulz interprets sensory experience within phenomenological structures of meaning; Pallasmaa generalizes perception into concepts of embodiment and sensory qualities; and Eisenman—even without relying on empirical data—generates the initial conceptual structure in the form of the diagram. Therefore, a necessary intermediate layer, “conceptual organization,” exists between initial experience or thought and the final theory.
The third pattern, “the transformation of the knowledge process into form or spatial understanding,” uncovers a commonality among the theories: knowledge does not remain solely at a conceptual level, but is translated by each theory into a renewed understanding of architectural space or form. In Eisenman’s thought, form results from formal logic; in Rossi’s theory, it is the manifestation of types and stable urban structures; for Norberg-Schulz, it is the embodiment of the meaning of place; and in Pallasmaa’s thought, it is an extension of embodied perception. This pattern demonstrates that architectural theory possesses a dual nature: it is simultaneously epistemic and spatial-formal.
The fourth pattern, “the relationship between theory and experience,” clarifies both the point of differentiation and commonality among the theories. Every theory—even the most rationalist—adopts a specific stance towards experience. Eisenman prioritizes logic by eliminating or downplaying experience; Rossi views experience as raw material to be rationally analyzed; Norberg-Schulz places lived experience as the foundation of theory, revealing the meaning of place; and Pallasmaa considers multi-sensory experience as the source of embodied consciousness and theory-creation. Thus, “the place of experience in the construction of theory” is a common, recurring element across all approaches.
The fifth pattern, “the staged transition from data or thought to theoretical framing,” presents the theory-formation process as step-by-step. Eisenman moves from theory to diagram and then to form; Rossi proceeds from observation to analysis, from analysis to typology, and from typology to theory; Norberg-Schulz moves from experience to interpretation, from interpretation to concept, and from there to theory; and Pallasmaa progresses from experience to embodied perception, then to analysis, and finally to theory. This pattern indicates that theory-creation in architecture is a gradual process. Knowledge is not transformed into theory in a single leap, but emerges from a structured, sequential progression.
To validate this conceptual model, it can be examined from four main aspects: internal coherence, epistemological comprehensiveness, applicability in architectural theory-creation, and alignment with philosophical and methodological traditions. Such an approach allows the model to be assessed not only for its structure and diversity of epistemic sources, but also for its ability to translate ideas into testable hypotheses, and its capacity to align with classical and contemporary intellectual currents. This provides a basis for clarifying the model’s validity across various dimensions, and determining its position within architectural theory-creation, as well as within scientific and interdisciplinary theory-creation.
In conclusion, the interaction between Rationalism and Empiricism in the process of architectural theory-creation can be explained in the form of a multi-stage, complementary epistemological mechanism. The starting point of theory-creation is always the determination of the “primary source of knowledge.” However, this source can vary depending on the theoretical approach. Rationalism initiates the process with general concepts, a priori principles, or formal structures, while Empiricism seeks its starting point in observation, lived experience, environmental perception, and embodiment. Consequently, two entry paths into theory are formed: entry from “concept” or entry from “experience.”
In summary, it can be stated that architectural theory-creation establishes a complementary, rather than purely oppositional, relationship between Rationalism and Empiricism. A theory may begin with either experience or reason; but as it develops, it inevitably requires both rational conceptual organization and empirical validation. The process of theory-creation in architecture is neither one-dimensional nor single-stage; rather, it is a phased, dual-path process in which experience provides grounding and reason provides structure. The outcome of this interaction is the formation of a theory that is both rooted in reality and conceptually coherent.