As best as I can recollect, this is one of the stone (marble?) discs that make up the “Tears of the Sky” Sculpture at the Boboli Garden in Florence, Italy. The other discs are scattered around the area, mostly laying on their side. When I saw this tourist walking up the the disc I waited to capture this composition. And every time I see it I hear Gyorgy Ligeti’s Atmosphères playing in my head…