Igor Stravinsky was a Russian composer who lived during the 20th century. He is considered one of the most influential composers of the modern era. Stravinsky's music is characterized by its rhythmic complexity, innovative use of harmony, and bold experimentation. His compositions span a wide range of genres, including ballets, symphonies, operas, and chamber music. Some of his most famous works include his ballets 'The Rite of Spring' and 'Petrushka,' his Symphony of Psalms, and his opera 'The Rake's Progress.' Stravinsky's music continues to challenge and inspire musicians with its avant-garde approach and groundbreaking ideas.