Courtyard and sunken courtyard illustration

Quick answer：

The term 'Courtyard and sunken courtyard illustration' refers to visual representations of courtyard and sunken courtyard designs, commonly used in architectural plans and presentations. A courtyard is an open space surrounded by buildings, often found in traditional Asian architecture, providing a tranquil outdoor area. A sunken courtyard, also known as a courtyard garden, is a courtyard that is lower in elevation than the surrounding ground level, creating a more intimate and secluded space.