What is a unique object? A strange thing, a meteorite, an absolute condensed into a single point, something that is not interchangeable with anything else, it could be an idea, a building, a color, a feeling, a human being. Its very uniqueness is always what puts it at risk. In the face of media expansion and the globalization of culture, in the face of the leveling of values and the generalization of a thought shaped exclusively by opinions, where can we still find unique objects? How to define them, create them, protect them, recognize them? Developing their dialogue around this theme, Jean Nouvel and Jean Baudrillard approach other fundamental problems concerning the years to come. They imagine what the city of tomorrow will be like, wonder why the ideal of transparency has gradually infiltrated all spheres, from politics to architecture. They finally address the difficulty of freedom. An essay on uniqueness, therefore, that permeates the work and quest of both. And which also defines a certain ethic. A text born of passion and generating passion in the face of the great transformations that are heralded.