This is a salon-style waltz composed by the Bohemian virtuoso Franz Bendel, intended for light domestic entertainment. It is distinguished by its typical late-Romantic melodic charm and graceful, idiomatic piano writing.
At Henle 4 this is an intermediate piece that expects secure technique and real attention to phrasing. The main demands: a waltz lilt that needs charm and a flexible left hand; a true singing tone, with the melody floating above the accompaniment; and rubato that must breathe naturally without losing the pulse.
Beyond that, expect chord voicing — bringing out one note inside a handful of others.
Focus on maintaining a steady waltz rhythm while applying a subtle, singing rubato to the melodic lines.
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.
Erinnerung an Innsbruck (Op.90) 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 Erinnerung an Innsbruck (Op.90) lasts about 4 minutes.
Erinnerung an Innsbruck (Op.90) 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 Berg-Idylle by Franz Bendel, By Moonlight by Franz Bendel, Waltz No. 2 by Dmitri Shostakovich — see the full similar-pieces list on this page.