Anzoletti’s Allegro sereno provides a contrast to his more technical works, emphasizing sustained melodic lines and harmonic warmth. It is distinct for its balanced, calm atmosphere and nuanced phrasing requirements.
Develop a singing tone while balancing the melodic line against the supporting accompaniment.
Comparable difficulty and character — good candidates for what to learn next.
Allegro sereno 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.
Allegro sereno 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 Allegro sereno in D major by Marco Anzoletti, Allegro Moderato in C major by Marco Anzoletti, Cantilena by Marco Anzoletti — see the full similar-pieces list on this page.