Design of sunken courtyard with a ceiling

Quick answer：

Sunken courtyard design with a ceiling refers to a garden or courtyard that is lower than the surrounding ground level, and is covered by a roof or a ceiling. This design is often used to create a private, sheltered space that can be used for various activities or as a green oasis in urban environments. The ceiling can be open, allowing natural light and ventilation, or closed to provide shade and protection from the elements.