Leonardo da Vinci drew the illustrations for Luca Pacioli's 1509 book De Divina Proportione (The Divine Proportion). Drawing of the Duodecedron Abscisus Elevatus Vacuus, consisting of 120 equilateral triangles, from the manuscript of the book. / Sacred Geometry <3
The Ducal Star, a glass lampshade based on a mathematical design that dates back to the 1400s, is a symbol of Urbino’s Renaissance. The shape of this star is considered mathematically perfect and was first described in De Divina Proportione (About the Divine Proportions), a book by mathematician Luca Pacioli, illustrated by Leonardo da Vinci, which dates to around 1497. Made of blown glass and brass, the lamp adorned the noble homes of Urbino.