One of two public art sculptures on 7th Street by Sam Sutton, the other ("Hyperbolic Ellipsoid") being a block to the south. Sutton moonlighted as an artist in between his work as an patent attorney. "Parabolic Spiral" was erected in the early 1980s as the City of Phoenix attempted to bring more art and culture to the downtown area.

Source: https://dtphx.org/art/parabolic-spiral