Σονάτων, or "sonatas," are musical compositions typically written for one or two instruments. They often consist of multiple movements, each with its own distinct character and tempo. The structure of a sonata usually follows a specific form, such as the sonata-allegro form, which includes an exposition, development, and recapitulation. The term "sonata" originated in the early Baroque period and has been used by many composers, including Ludwig van Beethoven and Wolfgang Amadeus Mozart. Sonatas can be performed on various instruments, with the piano being a common choice. They are an essential part of classical music repertoire and are often studied by music students.