This rare manuscript represents the lighter side of Neapolitan piano literature from the early 20th century. Its distinctive feature is the story-telling quality of the theme, which mirrors the theatrical nature of its title.
The main challenge is balancing the chords in the right hand to ensure the melody projects over the harmonic support.
Comparable difficulty and character — good candidates for what to learn next.
'O matremmonio d''o Princepe is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 3.
You should be comfortable at Henle level 3 — meaning you can already play level 2–3 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 'O matremmonio d''o Princepe lasts about 4 minutes.
'O matremmonio d''o Princepe 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 Bluebells of Scotland by Jules Egghard, Buffalo Bill's Farewell by William Sweeney, Blanche Alpen with Variations by Charles Balmer — see the full similar-pieces list on this page.