Plan of a sunken courtyard under the lighting floor

Quick answer：

A sunken courtyard under the lighting floor refers to a design feature in architecture where a courtyard is located below the level of the building's main floor, with the lighting floor situated above. This design is often used to create a more intimate and private outdoor space while maintaining a connection to the main living area. The plan would typically show the layout, dimensions, and architectural elements of the sunken courtyard.