What is the atrium? It sounds Roman.
I live in the Mexican tropics and it is an open air interior garden. Mine is about 8 X 17 ft with screens up about 10ft, to keep the insects and fruit bats out of the house. That was the first thing i added when I moved here. There are some really big bugs that come out of the jungle. The second thing l added was a brick floor so my cats would not use it as a huge litterbox. The final thing I added were windows with screens to keep the torrential tropical rains out of the house. The windows can be opened or closed to regulate the flow of air. Then l got ferrets and they love the space. Plenty of room to run and play whenever they feel like it. Lots of tubes and places to sleep. And they get to keep an eye on everything that is going on inside the house
Yes, it is a term for a Roman architectural feature where there is an open air interior courtyard with pool or fountain surrounded on all sides by the building’s rooms. It was a common all around the Mediterranean and then later brought over to latin America. The family’s private space complete with trees, flowers, sun and shade, and a water feature.