Sergei Mikhailovich Eisenstein was a pioneering Soviet film director and film theorist. He is best known for his innovative and influential work in the development of montage, a film editing technique that creates meaning through the juxtaposition of images. Eisenstein's films, such as "Battleship Potemkin" and "Alexander Nevsky," are celebrated for their powerful visual storytelling and their impact on the art of cinema. Eisenstein's theories on film aesthetics and his contributions to the language of cinema have had a lasting influence on filmmakers and film scholars around the world.