Study of the Graduations of Shadows on Spheres , by leonardo da vinci , 1492 , sketch and study , High Renaissance style , architectural drawings, Line, Symmetry
a drawing of a circle with lines going through it
A drawing is on a piece of paper. There is a circle drawn on the paper with many lines coming out of it. There are two pyramids in front of the circle with a black hole in the middle of them. On the right side of the paper there is a stamp. The stamp has writing on it.