by George Rumpler
The Castle in Malbork (Polish: Zamek w Malborku, German: Marienburg) is the largest castle in the world by area. It was built in Prussia by the Teutonic Knights, a German Roman Catholic religious order of crusaders, in a form of an Ordensburg fortress. The Order named it Marienburg (Mary's Castle). The town which grew around it was also named Marienburg.