Franz Krommer (Czech: František Vincenc Kramář; 27 November 1759 – 8 January 1831) was a Czech composer of classical music and violinist. He was one of the most popular composers in the 19th century Vienna. In 1818 Krommer succeeded Leopold Koželuch as composer for the Imperial Court of Austria, the post he held until his death. His output was prolific, with at least three hundred published compositions in at least 110 opus numbers including at least 9 symphonies, seventy string quartets and many others for winds and strings, about fifteen string quintets and much sonorous, idiomatic and at times powerful music for wind ensemble, for which he is better known today. Today he is mostly known for his clarinet concertos.