First of all, I want to say that I am not fluent in English, and also, I hope I can post it here.

Themes: Fall of Weimar Republic / Rise of Nazism / Homosexuality and transexuality in Berlin in the 1920's / women's condition.

I have to present two primary sources; pictures of the Eldorado club (famous "Gay club" in Berlin) in 1930, before the publication of paragraph 175 (states that: "being homosexual = bad") and after (lgbt+ friendly club closed) (link in comments if I can). I can't find WHO and WHEN exactly were these two photos taken. I want to know if y'all have a way to figure this out? Like a tool in order to find where do the sources come from exactly?

Also I want to know a bit more about the "LGBT" community at that time. I looked up for informations, but overall, it is not extremely precise.

Is there someone who can give me good resources for information about homosexual/trans community in Berlin in the 20-30's? Anyone knows "fun facts" about this era and about Berlin at that time?

Thank you!