The Old Guitarist was created by Pablo Picasso in 1903 while he was living in Spain during what would be later referred to as his Blue Period, hallmarked by almost universal use of a monochromatic blue palette, somber and dismal subjects and an overall impoverished tone.
This is Not a Pipe
Pablo Picasso and Cubism
Henri Matisse and Pablo Picasso
Victor Vasarely Zebra, 1937 - Setting the Course of Optical Art in the 20th Century
Jacqueline Roque Biography