The Echoes-sphere aims to amplify people's voices through an innovative, AI led, interactive system that transforms visitor sounds and voices into immersive architectural contents. The pavilion becomes a real time materialisation of sounds and voices captured into the center of the building and translated, through an advanced AI process, in dynamic graphic contents projected onto the inner dome. The Architecture of the pavilion, despite its dimensions (20m x 20m x 20m), is imagined as an “invisible architecture” by using reflective, mirror-like, facade claddings able to reflect the surroundings and the daily change of light and colors. The focal point of the installation is the inner sphere carved out from the simple cuboid of the exterior. The result is an unexpected and Iconic volume that creates curiosity and encourages people to get closer and experience it inside-out. The inner sphere, with a diameter of 22 m, is off-centered compared to the center of the Cuboid with the intention to create circular monumental openings for access and visibility on 3 of the 4 vertical faces of the building. The inner Digital Dome, fully covered with LED, forms a magnificent live installation. Connected to the Engagement Central Sphere at the center of the space (made of many high fidelity microphones) the AI system will convert the sounds and voices collected there in order to create the media expression showcased on the inner LED dome.