Create a refined glass artwork that gives the illusion of a singular, ultra-thin glass sphere. This sphere is so delicately thin that it almost defies perception, merging multiple layers into what appears to be a single, flat surface. Atop this glass, a subtle and intricate design is carefully rendered, suggesting an image that is both part of and apart from the glass itself. The artwork should employ a light touch with shading and detail to convey the fragility and translucence of the glass, while the image on the top layer should be depicted with clarity and precision, standing out against the almost invisible backdrop. The overall piece should be a study in subtlety and finesse, challenging the viewer to discern the fine line between the glass and the image it bears. Background sunlit windowsill in Paris