Frédéric Chopin 1810-1849

This Polish composer and pianist of the Romantic school is regarded by some as the greatest composer of piano music.

Fantaisie in F minor, op. 49

The Fantaisie was composed during 1840-1, about the same time as the Third Ballade. As a composition it shows some of Chopin's finest music.
In general character it belongs to the ballade class, but it differs in that it employs three themes and a time signature of 4/4 instead of 6/8.
The opening march-like theme, the dramatic and lyrical episodes, the B major oasis of the lento sostenuto, the final chromatic avalanche-these form a design of musical fantasy, but they are also reminiscent of the progress of a ballade.

Picture from The Great Composers.