This piece is a delicate, late-Romantic to early-Modern lullaby by the Russian virtuoso Samuil Feinberg. It is distinctive for its dense, chromatic harmonic language and lush, layered piano textures.
Achieving a seamless, balanced tone in the interior voices while maintaining the melodic line is the primary technical hurdle.
Comparable difficulty and character — good candidates for what to learn next.
Berceuse (Op.19a) is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 8.
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 Berceuse (Op.19a) lasts about 4 minutes.
Berceuse (Op.19a) 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 Alleluia by Cécile Chaminade, Barcarolle by Dora Pejačević, Bilder aus dem Süden by Jean Louis Nicodé — see the full similar-pieces list on this page.