Heinrich Wilhelm Ernst (8 June 1812 – 8 October 1865) was a Moravian-Jewish violinist, violist and composer. He was widely seen as the outstanding violinist of his time and one of Niccolò Paganini's greatest successors. He was a highly esteemed artist in his day. Many saw him as the superior violinist of his time and Paganini's greatest successor. Not only did he contribute to polyphonic playing, but he also discovered new idiomatic ways to compose polyphonically conceived violin music. His friends included Hector Berlioz and Felix Mendelssohn.