The Piano Sonata No. 1 in F♯ minor, Op. 11, was composed by
Robert Schumann from 1833 to 1835. He published it anonymously as "Pianoforte Sonata, dedicated to Clara by Florestan and Eusebius".
Eric Frederick Jensen describes the sonata as 'the most unconventional and the most intriguing' of Schumann's piano sonatas due to its unusual structure. The Aria is based on his earlier Lied setting, "An Anna" or "Nicht im Thale".
