Fugue during classical period
During the Classical period, fugue was not in position of prominence. However composers like Haydn, Mozart and Beethoven revived the fugal style and they included it in some of their works. For example: Haydn, the sun quartets, op 20, 1772. Mozart: symphony 41, requiem-
Writing fugue as part of a larger work was a common practice between classical composers . They used to include a fugal section in their texts but usually they abandoned it after a while , in favor of a purely homophonic style. So, the genre had lost its independence.
Fugue during romantic period (19th century)
Writing fugues was an important part of music education and some standards had been established for this purpose. This happened especially after the renewed interest in Bach's music after and the publication of the works of Bach-
Composers brought fugue back to its position of prominence, as they realized its uses in full instrumental works, its importance in development and introductory sections and the developmental capabilities of fugal composition.
Some of the late romantic composers such as Max Reger (1873-
Later on, several composers have used extensively fugue. For example: Bela Bartok
Stravinsky : Symphony of Psalms (2nd mvt)