The Naval Academy Mürwik (German: "Marineschule Mürwik") is the training school for German Navy officers in Flensburg-Mürwik. The castle-like building overlooks the Flensburg Fjord. Called the "Red Castle", it is well known for its beautiful architecture. It was patterned after the Marienburg (Malbork Castle) in Poland, the seat of the Teutonic Knights.