Malbork Castle - 14th-century Teutonic castle housing museum of medieval artifacts, paintings & an amber collection. The largest castle in the world measured by land area. It consists of three separate castles - the High, Middle and Lower Castles, separated by multiple dry moats and towers. The castle once housed approximately 3,000 "brothers in arms". The outermost castle walls enclose 21 ha (52 acres), four times the enclosed area of Windsor Castle. Malbork Castle remains the largest brick building in Europe.