This piece is a masterwork by Peter Philips, demonstrating the peak of English virginalist composition found in the Tregian manuscript. It is highly esteemed for its complex weaving of melodic lines and rhythmic variation.
The player must manage large-scale rhythmic organization while articulating delicate ornaments.
Comparable difficulty and character — good candidates for what to learn next.
Allemanda Tr(egian) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 7.
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.
A typical performance of Allemanda Tr(egian) lasts about 4 minutes.
Allemanda Tr(egian) 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 Am spinett by Christian Sinding, Bonny Sweet Robin by John Bull, Bénédiction by Louis James Alfred Lefébure-Wély — see the full similar-pieces list on this page.