Reposting because I forgot sources.

https://en.wikipedia.org/wiki/Teutonic_Order

https://en.wikipedia.org/wiki/Iron_Cross

https://en.wikipedia.org/wiki/Bailiwick_of_Utrecht

https://en.wikipedia.org/wiki/Order_of_the_Red_Eagle

https://en.wikipedia.org/wiki/Order_of_the_Black_Eagle

https://en.wikipedia.org/wiki/Order_of_the_White_Eagle_(Poland)

https://en.wikipedia.org/wiki/House_of_Hohenzollern

https://en.wikipedia.org/wiki/Charles_IV,_Holy_Roman_Emperor

The Nazi's were a front for the 'Black Cross'. The Black Cross was created during the siege of Acre, Kingdom of Jerusalem during the Third Crusade. The wreaths and eagles tie the Iron Eagle ultimately to the House of Hohenzollern(Prussians). Their Coat of arms details them and their extended families power structure. This info-graphic ties their symbols to their money and follows the evolution of their symbols to the 'Iron Eagle with the Swastika'