Malbork Castle is one of Poland's most popular tourist attractions. More than 500,000 tourists visit it every year. A huge share of them explore the Teutonic fortress with an audio guide.The Teutonic Order began building the castle in the 13th century, and work continued until the mid-15th century. The building was the seat of the Order's authorities, including the Grand Commander. In the 15th century Malbork came under the rule of the Polish kings and from then on served as one of the monarch's residences. During the last war the fortress was reduced to ruins. Later there were even plans to demolish it completely, which fortunately never happened.The audio guide makes it easy and enjoyable to visit the most important parts of the Middle and High Castles and the Grand Masters' Palace.The audio guide has been prepared in two versions: for adults and for families with children.