Pablo Picasso's Blue Period (1901-1904) marked a time of introspection and melancholy, inspired by personal loss and poverty. The paintings, dominated by blue tones, often depicted solitary figures and themes of hardship.

This period highlighted Picasso's emotional depth and marked a shift toward his later experimentation with form and style. Key works include 'The Old Guitarist' and 'La Vie,' embodying profound humanity and sorrow.