1 in C minor, Op.
4 was written by Frédéric Chopin in 1828 (probably begun around July).
[1] It was written during Chopin's time as a student with Józef Elsner, to whom the sonata is dedicated.
Despite having a low opus number, the sonata was not published until 1851 by Tobias Haslinger in Vienna, two years after Chopin's death.
[2][3] This sonata is considered to be less refined than the later 2 sonatas, and is thus much less frequently performed and recorded.