The Triforium is the name of a six story 60 ton public sculpture in the Los Angeles Mall Civic Center complex , located at the intersection of Temple and Main Streets in Downtown Los Angeles . History The Mall's architect, Robert Stockwell commissioned artist Joseph Young to create the sculpture and it was installed in 1975. [1] Young's original plans called for the piece to be a Kinetic sculpture , which would use motion sensors and a computer controlled system to detect and translate the motions of passersby into patterns of light and sound displayed by the prisms and carillon . Young predicted that his artwork would eventually become known as "the Rosetta Stone of art and technology" and boasted that it was the world's first "polyphonoptic" tower. He also said that the Triforium was a tribute to the unfinished, kaleidoscopic nature of Los Angeles. In the original concept, Young intended for the sculpture to project laser beams into space,...