Why did Haydn create sonata?

a survey of the development of the modern sonata from its roots in the 18th century and was written for his Music History ... Sonata form is an instrumental form that developed from the continuous rounded binary form of ... To establish a good base model for the early sonata, take a look at a few of Haydn's sonatas. read more

Actually he didn't ‘create’ sonata. Instead he used a scheme, which was then studied and used by other classical composers. read more

Properly speaking, sonata form did not exist in the Baroque period; however, the forms which led to the standard definition did. In fact, there is a greater variety of harmonic patterns in Baroque works called sonatas than in the Classical period. read more

Franz Joseph Haydn wrote some 51 sonatas for piano and several other short piano pieces. Most of these were written in his early years. He was not a pianist, and, as his career developed, he lost interest in the genre. read more