A wander down the corridors of the Institut Henri Poincaré, the French "house of mathematics", might provide a few answers. Mathematician Cédric Villani and physicist Jean-Philippe Uzan invite you to explore their universe and the people init. Vincent Moncorgé's stunning photos guide you through the often mysterious process of how science happens. The many aspects of mathematics, be they scientific, aesthetic, poetic, are presented from a variety of perspectives : the abundant sources of inspiration for researchers, the deep well of their creativity, the imaginary world of mathematics in literature and art, not forgetting the mathematicians themselves. Travel to the heart of this mathematical haven, a French-style campus attracting hundreds of visiting researchers from around the world. Known for its scientific emulation and discussions, this unique institution is a key contributor to the reputation of the French mathematical school.