👉 Oratorium is a type of musical composition that originated in ancient Greece and Rome. It consists of an oratory, which is the act of speaking or singing to a large audience, and an oboe, which is a small instrument used for playing music. The term "oratorium" comes from the Latin word "oratorum," which means "speech." In this context, it refers to a musical composition that uses a combination of spoken words and musical instruments. The oratory allows the