The Piano Sonata in C-sharp minor, Op. posth. 80, was written by Russian composer Pyotr Ilyich Tchaikovsky in 1865, his last year as a student at the St Petersburg Conservatory. The sonata in its original form was not published in Tchaikovsky's lifetime; it was published in 1900 by P. Jurgenson, and given the posthumous opus number 80.
| Date of composition | 1865 |
| First published | 1900 in Moscow, Russia |
| Type | Sonata |
| Tonality | C-sharp Minor |
| Catalogue | Op. 80 |
| Approx. duration | 27 minutes |
| Arrangement of | Pyotr Ilyich Tchaikovsky: Symphony No.1 in G minor, Op. 13 "Winter Daydreams" |
| Instruments | Orchestra |
| Autotranslations beta |
Piotr Ilitch Tchaïkovski: Sonate pour piano n°2 en do dièse mineur, Op. 80 Pëtr Il'ič Čajkovskij: Sonata per pianoforte n. 2 in do diesis minore, Op. 80 Pjotr Iljitsch Tschaikowski: Sonate Nr. 2 für Klavier cis-moll, Op. 80 |