Geometry: Pablo Picasso, Sleeping Peasants, 1919, and the Golden Rectangle

Successive Golden Rectangles dividing a Golden Rectangle into squares (Pablo Picasso, Sleeping Peasants, 1919).

Nude, Green Leaves and Bust by Pablo Picasso and Golden Rectangles

Pablo Picasso (1881 - 1973) was a Spanish painter, draughtsman, and sculptor. As one of the most recognized figures in 20th-century art, he is best known for co-founding the Cubist movement and for the wide variety of styles embodied in his work. Source: Wikipedia, Pablo Picasso

La Siesta, Sleeping Peasants. 1919, Tempera, water-color and pencil. The Museum of Modern Arts, New York, NY, USA, is a painting by Pablo Picasso.

A golden rectangle is a rectangle whose side lengths are in the golden ratio, one-to-phi, that is, approximately 1:1.618. A distinctive feature of this shape is that when a square section is removed, the remainder is another golden rectangle, that is, with the same proportions as the first. Square removal can be repeated infinitely, which leads to an approximation of the golden or Fibonacci spiral.  

Sleeping Peasants, 1919 by Pablo Picasso