Sergei Diaghilev was a Russian art critic, ballet impresario, and founder of the Ballets Russes, a revolutionary ballet company that changed the landscape of dance in the early 20th century. Born in 1872, he played a crucial role in introducing Russian ballet to the Western world, collaborating with renowned artists and composers. Under Diaghilev's direction, the Ballets Russes showcased innovative choreography and stunning visual designs, featuring works by famous figures like Igor Stravinsky and Pablo Picasso. His influence extended beyond ballet, impacting modern art and music, and he is remembered as a key figure in the cultural movement of the time.