Floor plan of a sunken courtyard

Quick answer：

A sunken courtyard, also known as a sunken garden or sunken patio, is a garden or courtyard that is lower in elevation compared to its surroundings. The floor plan of such a courtyard typically includes features like steps, terraces, pathways, and landscaping elements designed to create a sense of privacy and intimacy. It often integrates with the home's architecture and can serve as a quiet retreat or outdoor living space.