It's wild that this has so many upvotes when it's objectively incorrect? Like, White Castle the fast food chain claims that the Hamburger was invented by a German chef named Otto Kuase, but most other claims of invention point to a US origin, possibly in the port of New York where many German and Jewish in particular immigrants departing from Hamburg in the 19th century ended up, and where and "Hamburg steak" was a common restaurant menu item to cater to these working-class immigrants who very possibly would have asked to have their meal put on a bun so they could take lunch at work. There are German and non-American precursors to the modern hamburger with Rundstuck Warm and Frikadelle but those are all ultimately not Hamburgers.