Hamburger Concerto is the fourth studio album by the Dutch progressive rock band Focus, released in May 1974.

[4] The title track is based on Variations on a Theme by Haydn by Johannes Brahms.

The composition also incorporates the first two verses of the Dutch Christmas carol O Kerstnacht, schoner dan de dagen at around 15 minutes, and the Third Quarter chime from the Westminster Quarters is quoted in the track's final seconds.

The first track is based on a Gaillarde of Joachim van den Hove of his work Delitae Musicae.

^ Shipments figures based on certification alone.