Halina Krzyżanowska, a Polish composer active in France, composed this work with a distinct sense of late-Romantic sentimentality. It is distinguished by its expressive harmonic shifts and delicate melodic turns.
Focus on the use of rubato to convey the emotional depth of the harmonic changes.
Comparable difficulty and character — good candidates for what to learn next.
Berceuse (Op.27) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 7.
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 Berceuse (Op.27) lasts about 4 minutes.
Berceuse (Op.27) 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 by Halina Krzyżanowska, Berceuse héroïque by Claude Debussy, Berceuse by Artur Lemba — see the full similar-pieces list on this page.