Malbork [ˈmalbɔrk] (German: Marienburg is a town in northern Poland in the Żuławy region (Vistula delta), with 38,478 inhabitants (2006).
Founded in the 13th century by the Knights of the Teutonic Order, the town is noted for its medieval Malbork Castle, built in the 13th Century as the Order's headquarters and of what later became known as Royal Prussia.
The town of Marienburg grew in the vicinity of the castle. The river Nogat and flat terrain allowed easy access for barges a hundred kilometers from the sea. During Prussia's government by the Teutonic Knights, the Order collected tolls on river traffic and imposed a monopoly on the amber trade.