Louis Glass was a prominent Danish composer whose piano works bridge late Romanticism and Nordic impressionism. This piece is marked by its lush, thick textures and deeply introspective emotional arc.
At Henle 6 this is an advanced piece that assumes fluent technique and rewards mature interpretation. The main demands: chord voicing — bringing out one note inside a handful of others; rubato that must breathe naturally without losing the pulse; and wide stretches that reward larger hands and clever redistribution.
Beyond that, expect several simultaneous layers, each needing its own dynamic level.
The student must navigate thick chordal voicing to ensure the primary melody remains resonant above the denser accompanimental textures.
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.
Fantasi (Op.47) is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 7.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 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 Fantasi (Op.47) lasts about 7 minutes.
Fantasi (Op.47) 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 Berceuse élégiaque, BV 252a by Ferruccio Busoni, Autumn Song by Cyril Scott, Cloches dans la brume by Blanche Selva — see the full similar-pieces list on this page.