An oratorio is a large musical composition for orchestra, choir, and soloists. It typically tells a religious story and is performed in concert settings rather than staged like an opera. The music is structured in various sections, including arias, recitatives, and choruses, allowing for both dramatic expression and lyrical beauty. The most famous example of an oratorio is Handel's Messiah, which is often performed during the Christmas season. Unlike operas, oratorios do not include acting, costumes, or scenery, focusing instead on the music and the text, which is usually based on biblical themes or stories.