Wartburg Castle is a castle in Thuringia, situated above the town of Eisenach at the north-western end of the Thuringian Forest, 411 m above sea level. It was founded around 1067 by Louis the Knight and has been a UNESCO World Heritage Site since 1999. The name means Warte, i.e. watch, guard castle. The district of Eisenach called Wartha, however, has no connection with the Wartburg. Most of today's Wartburg was rebuilt in the 19th century, incorporating a few preserved parts. The present appearance of the Wartburg and its landscaped park goes back to Grand Duke Carl Alexander of Saxe-Weimar-Eisenach.