Schubert's 'An die Leier' D. 737 is a song inspired by the ancient Greek lyre, and its piano arrangement conveys a sense of flowing melody and harmonic richness. It is distinguished by its graceful, yet sometimes dramatic, contours.
The main technical challenge lies in creating a fluid, singing line with careful control of dynamics and rubato.
An die Leier(Op.56 No.2) (D.737) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 5.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of An die Leier(Op.56 No.2) (D.737) lasts about 4 minutes.
An die Leier(Op.56 No.2) (D.737) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.