Silbury Air is a musical composition for chamber ensemble by the English composer Sir Harrison Birtwistle.
"[1] Across the two-part structure Birtwistle first focuses on the rhythmic and processional, despite the absence of what those rituals might be.
Birtwistle has stated that the piece follows a strict logical pattern, but chooses not to disclose what that is, much as Silbury Hill has never revealed its purpose to archaeologists.
In the second half the "Air" of the title emerges on the flute, before moving to the woodwind, at a tempo independent of the pulse of the rest of the ensemble.
The premiere was given by the London Sinfonietta under Elgar Howarth at the Queen Elizabeth Hall on 9 March 1977.