was mainly influenced by German Expressionist art, and the emerging German Objectivist art, as well as what we call Art Deco. The most expressionistic influence on its architecture can be seen quite early in the film, when Freder Fredersen gestures out at the city to his father and we subsequently see a series of - impossible
- architectural creations.
There are plenty of other visual nods as well, offhand, there is a Satanic pentagram behind the robot as it is being transformed into Maria's doppelganger. As far as pulps go, there are
native German pulps of the era - Lang's next science fiction film, Woman on the Moon
, includes a scene where a young boy shows off his science fiction pulps. I don't know if these had any influence.