Andrei Arsenyevich Tarkovsky was a Soviet filmmaker, writer, film editor, film theorist, theatre and opera director. Tarkovsky's films include Ivan's Childhood, Andrei Rublev, Solaris, Mirror, and Stalker. He directed the first five of his seven feature films in the Soviet Union; his last two films, Nostalghia and The Sacrifice, were produced in Italy and Sweden, respectively. His work is characterized by long takes, unconventional dramatic structure, distinctly authored use of cinematography, and spiritual and metaphysical themes. His contribution to cinema was so influential that works done in a similar way are described as Tarkovskian. Ingmar Bergman said of Tarkovsky: "Tarkovsky for me is the greatest, the one who invented a new language, true to the nature of film, as it captures life as a reflection, life as a dream."

https://en.wikipedia.org/wiki/Andrei_Tarkovsky