How George Lucas was inspired by Metropolis

I finally got to see Fritz Lang's Metropolis (1927), though I'm not quite finished watching it yet.
Anyway, maybe there already was a discussion about some similarities or how GL was eventually inspired. If so you can lock this thread.

Joh Fredersen (Freder's father):
Was this the inspiration for Grand Moff Tarkin? Not only does the actor Alfred Abel look like Peter Cushing he also has a similar body acting. His character is in a high position too as he runs Metropolis.

http://www.geocities.com/Area51/5555/joh.jpg
http://pivarski.watson.org/metropolis/People/Fredersen.JPG

C.A. Rotwang, the inventor
He lost his right hand and therefor wears a black glove just like Luke and Anakin.

http://hunter.apana.org.au/~gallae/hecate/images/media/metropolis_rotwang.jpg

HEL, the female Maschinen-Mensch.
This was mentioned before. Ralph McQuarrie used her as a reference for C-3PO's design.

http://home.in.tum.de/~paula/pic/movie_posters/metropolis.jpg

Metropolis.
The design of the city is iconic. Most Sci-Fi movies were inspired by it. Coruscant for example.

http://www.ulises-valiente.com/wakan/numero3/images/metropolis.jpg

Anything else? Any opinion about it?

 

I think this could be an interesting thread, but seems more suited to the Saga Forum.