Værket, skrevet for cimbalon, er senere versioneret for marimba solo af Gert Sørensen (høj og dyb version er tilgængelig), og visse grundmotiver indgår i værker som Sonora (for fløjte og harpe) og To mediterrane meditationer (for klaver).
ISTERNIA is the name of a little town in the Greek island Tinos. During a stay there I was inspired by the timeless peace that emitted from the shimmering white sculptured steps. The work was originally composed (1979) for cimbalom solo but was later rewritten for other instruments and the piece seems to possess a certain timeless or rather ´genre-less´ character; this is effected through the use of archetypal melodies and metres. In this respect the work is related to my ZIGZAG for percussion (1981), and Sonora (for flute/harp) is titled “Sonora”. A version of ISTERNIA for marimba solo was later arranged by Gert Sørensen.