What is the title of Picasso's painting that marks the beginning of a new period or emotional violence and expressionists distortion?

The title of Picasso's painting that marks the beginning of a new period characterized by emotional violence and expressionist distortion is "Les Demoiselles d'Avignon." Completed in 1907, this groundbreaking work is often considered a pivotal moment in the development of modern art, as it challenges traditional representation and explores complex themes of sexuality and identity. The painting's fragmented forms and bold use of color reflect Picasso's departure from realism and the emergence of Cubism.