This course seeks to explore the intimate relationship between architecture and philosophy by examining the grounds of our ability to judge designs and justify design decisions from the perspectives of the main philosophical movements of the twentieth century. At the beginning of the semester, The history of architecture will be analyzed considering the philosophical approaches. Each lecture will be concerned with the presentation of a biography of a thought-string. Sometimes a specific problem will take centre stage at other times a thinker or a movement. During each lecture students shall be looking at three things: the landscape or context in which the thinking takes place, the architecture of the thought and the mechanics of action that the thought appears to suggest. All this with reference to concrete examples from the world of design in architecture. Through the concrete examination and critique of specific buildings, designs and urban agglomerations from the perspective of these philosophical movements, the student will, at the end of the course, be in a position to place their own efforts in design and design thinking within an increasingly refined and well-practised frame of reference, helping him to make considered design decisions within social space and thereby undertake and undergo the odyssey of the design process with greater awareness.