It is one of eight concerti in Glass' series The Concerto Project, an amalgamation of works in four volumes.
The piece is scored for solo piano, accompanied by string orchestra.
An analysis by musicologist student Wilhelm Delport in 2015 rediscovered that the first and third movements borrow heavily from a Tyrolean Volkslied named, Maria!
(de), found in the Tyrolean Music Archive catalogue number A7249.
He also determined that the second composition is likely an expansion of the piece Raising the Sail from the motion picture soundtrack to The Truman Show (1998), which Glass also composed a few years earlier.