Atrium
An atrium was an attached part of a building. It could be built with glass walls and roof.

The Vulcan monastery at P'Jem featured an atrium as first room for entrance. The room was filled with several artifacts and statues, had a bench and several dividers as well as a huge round window. The atrium was the place of the  where visitors were greeted. In June of 2151, Lieutenant Malcolm Reed placed micro-charges behind a wall decoration depicting a face and detonated them to overwhelm the Andorians. ()

Tolen and Lidell Ren's house on  featured an atrium decorated with plants and flowers. In 2371, Lidell was smoking inside the atrium. ()

de: Atrium
Architecture
Building interiors