| Piano Sonata No.13 | |
|---|---|
| by Ludwig van Beethoven | |
&sq=Facebook&lang=en&file=File:Beethoven_Riedel_1801.jpg) Beethoven in 1801; painted by Carl Traugott Riedel | |
| Key | E-flat major |
| Opus | 27/1 |
| Composed | 1800-01 |
| Duration | 15 minutes |
| Movements | 3 or 4, depending on edition |
Piano Sonata No. 13 in E-flat major, Op. 27 No. 1, "Quasi una fantasia", is a sonata composed by Ludwig van Beethoven in 1800–1801.