Bach's 'Adagio in G major' BWV 968 is a sublime arrangement of a movement from one of his violin concertos, featuring a richly contrapuntal texture and a deeply contemplative mood. It is a testament to Bach's mastery of melodic invention and harmonic depth.
Focus on bringing out the individual voices in the polyphony and maintaining a serene, flowing momentum.
Adagio in G major (BWV 968) 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 Adagio in G major (BWV 968) lasts about 4 minutes.
Adagio in G major (BWV 968) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.