Jean-François Le Sueur (1760-1837) was a prominent French composer and conductor, primarily associated with the opera and sacred music genres. He is often noted for his contributions to early 19th-century French opera, bridging the transition from the classical to the romantic style. Le Sueur's most notable works include the operas "La Caverne" (1802) and "Les Templiers" (1820), the latter being particularly recognized for its dramatic score and historical themes. His opera "Hercule et Omphale" (1819) was also well-received, showcasing his ability to blend lyrical melodies with intricate orchestration. In addition to his operatic contributions, Le Sueur composed several oratorios and choral works, such as "L'Ordre des Célestes" (1825), which reflect his deep engagement with sacred music traditions. He was influential in teaching and mentoring younger composers, including Hector Berlioz, and served as a professor at the Paris Conservatory. Le Sueur's impact on music lies in his role in the evolution of French opera, emphasizing dramatic narrative and emotional depth, paving the way for later composers in the romantic era.