Sérgio de Camargo explored the rhythmic abstract geometry favored by the proponents of Kinetic and Op art that he met while living in Paris during the 1960s and 1970s. No. 415 is an assemblage of marble blocks of various sizes cut at different angles. By playfully alternating flat areas with triangular wedges, Camargo produced changing patterns of light and shadows. The cohesive organic quality and dynamic geometry of this sculpture lend it a monumental presence.