This course is a testing ground for the upcoming book and exhibition, Never Built Paris, which examines five centuries of unbuilt architectural and urban schemes for the French capital. The lab introduces students to the impact of unbuilt work on the city’s architecture and urban design, how ideas evolve over time, and how ambitious visions thrive or collapse. Students explore unbuilt projects through independent research, model-making, and exhibition design. They discover how Paris has always been—contrary to popular wisdom—a radical city, testing ideas with the power to change urban experiences worldwide.