Elevated Icosidodecahedron

This image is a sketch of a woodcut for an “elevated icosidodecahedron”; this shape was first sketched by da Vinci in De Divina Proportione. A polyhedron is “elevated” by augmenting each of its faces with a pyramid. This notion of elevation is a reflection of da Vinci’s fascination with the relationship of shapes to one another and the continuity of geometric figures. It is important to note that da Vinci was the first to sketch the icosidodecahedron, both in its standard and elevated form.

Source (for image and information):

Hart, George W. “Leonardo Da Vinci's Polyhedra.” George Hart, www.georgehart.com/virtual-polyhedra/leonardo.html.