Boëly's Fantasia Op. 57 highlights his bridge between the Classical style and the early Romantic period. The work is notable for its formal rigor and sophisticated contrapuntal developments.
At Henle 5 this is a late-intermediate piece — technically substantial, with musical demands to match. The main demands: independent voices that must each sing on their own line; fine finger independence within the hand; and precise articulation — the difference between crisp and blurred is the piece.
Beyond that, expect ornaments that need to sound effortless, not squeezed in.
The primary challenge is maintaining clarity and independence of voice in the contrapuntal sections.
Comparable difficulty and character — good candidates for what to learn next.
A level or two down with the same spirit — ideal if this piece is still out of reach.
Where this piece's skills lead: slightly harder works making similar technical demands.
Fantasia (Op.57) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 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 Fantasia (Op.57) lasts about 7 minutes.
Fantasia (Op.57) 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 Fantaisie by Alexandre-Pierre-François Boëly, Ciacona in D minor, P.41 by Johann Pachelbel, Fantasia, FVB 103 by William Byrd — see the full similar-pieces list on this page.