floor plan of an indoor sunken courtyard

Quick answer：

A floor plan of an indoor sunken courtyard typically shows the layout of a courtyard that is situated below ground level within a building. It includes details such as the dimensions of the courtyard, the placement of walls, floors, and any built-in features like steps, benches, or plants. This type of design is often used to create a peaceful and private outdoor space within a building, while also serving as a natural ventilation and lighting source.