He composed "Der Freischütz," which is considered by many to be the German national opera. Weber's "Oberon," on the other hand, was the most successful English opera for many years. His male choir piece "Lützows wilde Jagd" made him a musical symbol of an anti-French nationalism, although the composer, who had previously served the pro-Napoleonic German courts, wrote patriotic songs much later than others. His brilliant piano piece "Aufforderung zum Tanz" became very well-known, but it is just one of many great instrumental compositions by Carl Maria von Weber. He was also one of the most important opera conductors and music theater managers of his time, a virtuosic pianist—and he wrote texts about his craft that are still worth reading today. The late 19th century created an image of him that influenced many generations. However, it was primarily a projection of the cultural climate in 1871.