The rondo is a musical structure defined by a recurring main theme ("refrain") that alternates with contrasting sections, often following patterns such as ABACA. Originating in Italian opera and refined by French Baroque composers like Lully and Rameau, it became a fundamental element in Classical and Romantic music, employed by composers such as Mozart, Beethoven, and others.
Otto Jahn observed its significance in Mozart’s compositions, emphasizing its structural adaptability. The form’s lasting popularity stems from its harmony of repetition and change, allowing composers to merge creativity with tradition across generations.