Closed下沉courtyard实景

Quick answer：

A closed sunken courtyard is a type of architectural design where a courtyard is situated below the ground level of a building. It is typically enclosed by walls or other structures to create a private and sheltered space. Such courtyards are often used in traditional Chinese architecture and can be found in gardens, residential complexes, and historical sites. They provide a serene environment, away from the noise and hustle of the outside world.