The first stop in Heidelberg is the Heidelberg Castle on the top of the hill. The castle was built in the 13th century. It was struck twice in 1537 and 1764. It was severely damaged in the Thirty Years' War and the Great League War. It was twice destroyed by the French. The castle owner chose the Emperor family to move to Manhai. M. Some of the abandoned castles were later restored and rebuilt until the end of the 19th century when the main building was restored and used. Up to now, the unrepaired part is still broken, and some rooms in the upper part only have one outer wall. Therefore, this is a beautiful big castle and a ruined castle ruins. Many people come to Heidelberg. They are all running in this big barrel. Grosses Fass, because of the war, is the fourth barrel of similar size that was built repeatedly in the castle. Today's barrels were built in 1751 and can hold a total of 221,726 litres. There is also a so-called "Kleines Fass". Standing on Heidelberg Castle overlooking the entire Heidelberg Old Town and the University of Heidelberg, there is a sense of obsession. The green hills, the green waters of the Neckar River, the remains of the ancient vicissitudes of the old castle, and the old town with steep spires and deep stone paths are like a big picture. What is especially special is the old castle that has been destroyed. It is incomplete and not refined. It tells the story of the years in the broken wall, but it has also been comforted by time. It touches the hearts of the imperfections and still does not lose the wind of the king. It has also become one of the symbols of Heidelberg.