De Divina Proportione

"De Divina Proportione" is a mathematical work by Leonardo da Vinci’s friend, Luca Pacioli, published in 1509. It explores the concept of the golden ratio—an aesthetically pleasing proportion found in nature, art, and architecture. The book combines mathematical explanations with illustrations of geometric shapes, polyhedra, and artistic designs, demonstrating how this ratio creates harmony and beauty. It emphasizes the importance of proportion in both scientific understanding and artistic creation, highlighting how this divine ratio is fundamental to the order and elegance observed in the natural and human-made world.