The Heidelberg Castle is one of the most famous ruins in Germany and the symbol of the city of Heidelberg. The history dates back to the 13th century. Only over the centuries, it became the representative Heidelberg Castle as it is known today. The 30-year war ended the history of palace construction. The reconstruction was too difficult, so the castle was poorly restored. In 1720 the incumbent Elector Karl Philipp moved his residence to Mannheim and left Heidelberg Castle to its fate. Over time, it became a tourist attraction.