Sergei Eisenstein, 1925. The Odessa Steps sequence — montage's most-imitated five minutes.
From Wikipedia
Battleship Potemkin is a 1925 Soviet silent epic film produced by Mosfilm. Directed and co-written by Sergei Eisenstein, it presents a dramatization of the mutiny that occurred in 1905 when the crew of the Russian battleship Potemkin rebelled against their officers.