This solo piano arrangement of Liszt's 'Ave maris stella' captures the somber beauty of the original chant. It is highly regarded for its introspective harmonic language.
Mastering the pedal usage is essential for blending the harmonies without muddiness.
Comparable difficulty and character — good candidates for what to learn next.
Ave maris stella, Solo piano (S.506) is rated Henle level 7 of 9 — late advanced repertoire, roughly ABRSM grade 8 and above. In the RCM system it corresponds to about level 9.
You should be comfortable at Henle level 7 — meaning you can already play level 6–7 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 Ave maris stella, Solo piano (S.506) lasts about 5 minutes.
Ave maris stella, Solo piano (S.506) 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 Ave maris stella by Franz Liszt, Bénédiction de Dieu dans la solitude by Franz Liszt, Cantico del sol di Francesco d'Assisi by Franz Liszt — see the full similar-pieces list on this page.