Conceived by inventor John Hays Hammond Jr., this space was designed to emulate a Roman courtyard, complete with authentic architectural elements and artifacts. Notably, it features an archway constructed from volcanic pumice stone sourced from Mount Vesuvius, adding a tangible connection to antiquity.

Beyond its historical references, the atrium showcases Hammond’s inventive spirit. He integrated a sophisticated system of concealed pipes and plumbing beneath the glass ceiling, enabling him to manipulate the indoor climate -producing effects such as artificial rainfall and moonlight. This allowed Hammond to create immersive environments, often surprising guests with sudden weather changes during gatherings .