Leonardo da Vinci's Geometric Sketches - Sphere

We thank the Pennsylvania State University Libraries for allowing Convergence to publish the image above of Da Vinci’s illustration from their copy of the beautiful facsimile of Pacioli’s De divina proportione published by Silvana Editoriale, Milan, Italy, 1982. This facsimile is of the manuscript copy of Pacioli’s Divina held by the Biblioteca Ambrosiana in Milan, one of only three Pacioli made.