 According to Michael Several, an authority on early public art projects in Los Angeles, the Triforium sculpture incorporated three two-legged concrete pillars, each supporting a bank of multicolored Venetian glass prisms (1,494 in all).The installation also originally included a custom-built Gerhard Finkenbeiner electronic 79-note glass-bell carillon with two octaves of English bells, and two octaves of Flemish bells, which were synchronized to lighting effects contained within the glass prisms.Meant to play "everything from Beethoven to the Bee Gees", the carillon was operated manually, or by computer, with the resulting sound played through the speaker system built into the Triforium.