This is Liszt's piano transcription of his own setting of Goethe's famous ballad about the King of Thule. It features a simple, vocal-like melody supported by delicate, bell-like arpeggiated textures.
At Henle 4 this is an intermediate piece that expects secure technique and real attention to phrasing. The main demands: a true singing tone, with the melody floating above the accompaniment; rubato that must breathe naturally without losing the pulse; and chord voicing — bringing out one note inside a handful of others.
Beyond that, expect careful pedaling — clarity depends on the foot as much as the fingers, and a left hand with real melodic or rhythmic responsibility of its own.
The primary challenge is balancing the lyrical vocal line against the rhythmic accompaniment while maintaining a consistent atmosphere.
Comparable difficulty and character — good candidates for what to learn next.
A level or two down with the same spirit — ideal if this piece is still out of reach.
Where this piece's skills lead: slightly harder works making similar technical demands.
Lesser-known works by the same hand, at a comparable level.
Es war ein König in Thule (S.278) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 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 Es war ein König in Thule (S.278) lasts about 3 minutes.
Es war ein König in Thule (S.278) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Die Zelle im Nonnenwerth by Franz Liszt, Do not reproach me by Franz Liszt, 2 Album-Leaves by Franz Liszt — see the full similar-pieces list on this page.