Berlin: Die Sinfonie der Großstadt, 1927 (see DrMabuseDerSpieler for more)
A rather more conservative travel film of Paris in the 1920's (part 2; see travelfilmarchive for more).
I've been to Paris once; to Berlin, at least 5 times. Some people claim that you have to choose between France and Germany, you can't keep both (as lovers??), but it would be lovely if Paris could give me a chance again. I'm sure Berlin won't mind, she loves Paris, too.