An Ordensburg (plural in German: Ordensburgen) was a fortress built by crusading German military orders during the Middle Ages. "Ordensburg" was also used during Nazi Germany to refer to training schools for Nazi leaders. Medieval Ordensburgen The Ordensburgen were originally constructed by the Teutonic Knights and the Livonian Brothers of the Sword (merged into the Teutonic Knights in 1237) to fortify territory in Prussia and Livonia against the pagan aboriginals. Later, Ordensburgen were use… (More on Ordensburg)