This is NOT to scale, but gives you a general sense of the space. The Rotunda is about 32 X 32 feet square without extending north or south into the gallery/hall space.
This is not to scale; the Marble Court is about 32 X 32 feet square, without extending into the gallery/hall spaces.
This is a more detailed version of the first floor. You can also see the Dinan Gallery, the terraces and spaces in-scale. (Please click on image for a larger view.)