Today I got a nice postcard from Poland! The postcard shows a view of Malbork Castle, which is located by the river Nogat. More formally known as the Castle of the Teutonic Order in Malbork, it is the largest castle by surface area in the world and is also the largest brick building in Europe. It was completed in 1406 and was built the Teutonic Knights, a German medieval military order. The castle is also a UNESCO World Heritage Site. Thanks Marysia!