This is a salon waltz by the lesser-known composer Rudolf Valashek. It reflects the 19th-century fascination with the Cagliostro persona through light-hearted dance themes.
The primary challenge is maintaining a steady, buoyant waltz rhythm in the left hand while shaping the melodic line.
Comparable difficulty and character — good candidates for what to learn next.
Cagliostro-Valse (Op.3) is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 4.
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 Cagliostro-Valse (Op.3) lasts about 4 minutes.
Cagliostro-Valse (Op.3) 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 The Entertainer by Scott Joplin, Bach-bwv-anh-114 by Johann Sebastian Bach, Bach-anh-114 by Johann Sebastian Bach — see the full similar-pieces list on this page.