Answer
Jules Massenet is best known for his contributions to the Romantic era in music, which flourished from the late 18th to the mid-19th century. His operas, such as "Manon" and "Thaïs," exemplify the emotional intensity, dramatic storytelling, and rich orchestration characteristic of the Romantic period. Massenet's music is renowned for its lyrical melodies and expressive use of harmony, reflecting the Romantic emphasis on individual sentiment and artistic freedom.