This is an interesting piece. The grid system used would be needed for the base and the object floating on it. It is also likely that the artist used two point perspective. artist: Jost Amman - Geometrische Perspektivkonstruktion (c.
the differences between The Golden Section, The Golden String, and Fibonacci Numbers. These all essentially come together to form the same Golden Ratio but helps understand the breakdown of it all and why its so important.