Jean-Marie Leclair l'aîné, also known as Jean-Marie Leclair the Elder, was a Baroque violinist and composer. He is considered to have founded the French violin school. His brothers Jean-Marie Leclair the younger (1703–77), Pierre Leclair (1709–84) and Jean-Benoît Leclair (1714–after 1759) were also musicians. Leclair was renowned as a violinist and as a composer. He successfully drew upon all of Europe's national styles. Many suites, sonatas, and concertos survive along with his opera, while some vocal works, ballets, and other stage music is lost. In 1758, after the break-up of his second marriage, Leclair purchased a small house in a dangerous Parisian neighborhood, where he was found stabbed to death on October 23, 1764. Although the murder remains a mystery, there is a possibility that his ex-wife may have been behind it – her motive being financial gain – although the strongest suspicion rests on his nephew, Guillaume-François Vial.