In this paper, the author describes the Pavilion: Into the 21st Century project, a multimedia instrument based on the spherical mirror created for the Pepsi Pavilion - a visionary work of art and architecture originally created by E.A.T. (Experiments in Art & Technology) for Expo '70 in Osaka, Japan. The Pavilion is being returned to contemporary artists and audiences in order to extend the experience of the original to the Internet. The project draws from the fundamental notion of interdisciplinary collaboration and social interaction that was integral to the original concept - encouraging a freer, more participatory experience that breaks down the traditional distinction between artist, audience and artwork.