The concept of intuition has been one of the cornerstones of the philosophy of knowledge since antiquity. It has been used in different disciplines with distinctive meanings, but it has remained an unclear phenomenon. In particular, the term has been researched in philosophy and art, and the concept has been interpreted in different theoretical frameworks. The discipline of architecture, which is related to these fields, is often considered to be a problem-solving effort. This view highlights the rationalization attitude in modern architecture. In addition to this rationality, the unpredictable, multi-disciplinary, and open-ended structure of architectural practice makes the concepts of intuition and intuitive thinking an inseparable part of the architectural design process. Within the scope of the thesis, the role of intuition and intuitive thinking in the architectural design process has been examined. In the literature, commonly, architecture is interrelated with philosophy, art, and mathematics due to its scope. Moreover, intuitive thinking stands out as a concept related to the designer's historical background and level of expertise. In this framework, intuition in architecture is discussed in inference to the concept of intuition in philosophy, art, and mathematics and the idea of intuitive thinking based on experience. In addition, the notion is a subjective concept, and it has a structure with different expansions on the subject scale. At this juncture, intuition and intuitive thinking are examined and analyzed through the works of Architect Nevzat Sayın.