Étienne Louis Boullée, Cenotaph for Newton, 1784. France. Elevation & Cross-section, “at night with daylight effect”. Pen and brown ink and wash. Department of Prints and Photographs, Bibliothèque Nationale de France, Paris. © BnF. Source

A giant sphere punctured by holes that create the illusion of suspended stars. Similarly believing that the sphere represents the most perfect expression of the sublime, fellow French architects Claude-Nicolas Ledoux, Jean-Jacques Lequeu, and Leon Vaudoyer all design spherical buildings during this period. More about Giant Spheres: Source