THE FIRST HORROR SEQUEL was a Golem movie:

The Golem (1914-1920)



Hebrew mythology inspired one terrifying silent flick and the first horror sequel. Directed by German Paul Wegener, "Der Golem" ("The Monster of Fate"), (1914), showcases an ancient clay figure brought to life by a magic amulet to defend the Jews from Rudolf II of Habsburg. Neither alive nor dead, the man-made creature roams the Jewish ghetto of medieval Prague and wreaks havoc.

When his job is done, the monster - just like any human being -- refuses to give up his existence and all hell breaks loose. This eerie fright-fest was followed by "The Golem and the Dancer" (1917) and "The Golem: or How He Came Into the World" (1920).