Do you have a source for gunpowder coming to Europe through spain in the 14th century? Gunpowder is mentioned in european texts from the 13th century (but not necessarily for use in weapons) and as far as i know it isn’t really clear how, where and when exactly it came to Europe.

It’s the statue on top of the Brandenburg gate https://en.wikipedia.org/wiki/Brandenburg_Gate It was built long before the nazis. Doesn’t change the fact that it’s a nazi propaganda poster though.