classical
The so-called sonata-allegro form was established during the classical period, primarily by Franz Josef Haydn and Wolfgang Amadeus Mozart. It became the traditional form for the first movement of a symphony and later for chamber music such as sonatas, quartets, trios, etc.
fugue
Theme and variation was an entire form of classical music, consisting of its own movements.
The first movement of the following multi-movement genres in the classical and romantic periods is almost always cast in sonata form: Symphonies Concertos String quartets and other serious chamber music genres Solo sonatas (e.g. piano)
Orchestral music is, simply, music composed for an orchestra. "Classical" is a period (c. 1750 to 1820) in music histoy, however people often use the term classical to describe all western music of a high standard.
classical
The so-called sonata-allegro form was established during the classical period, primarily by Franz Josef Haydn and Wolfgang Amadeus Mozart. It became the traditional form for the first movement of a symphony and later for chamber music such as sonatas, quartets, trios, etc.
I think what your thinking of is a form of classical music called Baroque
no not all pieces do.
fugue
Classical music isn't tied to just one form of beliefs. Classical music, as all music is, the international language understood and read by all walks of life, and isn't owned or governed by any one body.
He helped form classical music
A ballet is a classical form of dance, or a theatrical performance of such a dance, usually with music and in the form of a story.
Theme and variation was an entire form of classical music, consisting of its own movements.
The first movement of the following multi-movement genres in the classical and romantic periods is almost always cast in sonata form: Symphonies Concertos String quartets and other serious chamber music genres Solo sonatas (e.g. piano)
Court music is music that was written specifically to be performed for the royal court. Chinese court music or "Yayue" was a form of classical music played in the imperial courts, for example.