Malbork Castle, located in Malbork, Poland, is recognized as the largest castle in the world by land area, encompassing approximately 21 hectares (52 acres), which is about four times the size of Windsor Castle. Constructed by the Teutonic Order starting in 1274, the castle was completed in 1406 and is notable for being the largest brick castle globally. Initially named Marienburg, it served as the headquarters for the Teutonic Knights and housed up to 3,000 members at its peak. The castle features three main sections: the High Castle, Middle Castle, and Lower Castle, surrounded by defensive walls and dry moats. Throughout its history, Malbork Castle changed hands several times and suffered significant damage during World War II. Following extensive restoration, it was designated a UNESCO World Heritage site in 1997. Today, it stands as one of Poland's top tourist attractions, allowing visitors to explore its extensive grounds, halls, and museums, with adult tickets priced at 80 Polish zloty (£16).