The expression “becoming one” is above all about being united and connected. The basis of the project is to reconcile the Léopold Bellan gymnasium in Bry-sur-Marne with a desire to create a space where the psychic and the physical are bound together. A gymnasium is a meeting place as well as somewhere to learn sport.Modularity, fluidity and plays on perspective all contribute to this pursuit of sharing, illustrated by a truly sensorial experience. Sight, listening and practice improve awareness and a new bodily consciousness. The project comes to life inside the building and extends to the outside. The new Bellan centre, through an intimate and personal initiation, becomes a meeting place, where the joy of sport and bodily well-being come together.