Plaster model of Rib Cage Dam site designed by Paolo Soleri in 1962

Photograph of inscriptions on a retaining wall at Cosanti in Paradise Valley, Arizona

Photograph of inscriptions on a retaining wall at Cosanti in Paradise Valley, Arizona

Photograph of inscriptions on a retaining wall at Cosanti in Paradise Valley, Arizona

Model of Arcube city structure Arcology design by Paolo Soleri, from 1970 exhibition at Corcoran Gallery of Art, Washington, DC

Model of double cantilever bridge design by Paolo Soleri shown at an exhibition

Model of Arcosanti Arcology city structure design by Paolo Soleri, from 1970 exhibit at Corcoran Gallery of Art, Washington, DC

Model of Arcosanti Arcology city structure design by Paolo Soleri, from 1970 exhibit at Corcoran Gallery of Art, Washington, DC

Model of Babel IIB Arcology design by Paolo Soleri at an exhibition

Model of Hexahedron Arcology city structure design by Paolo Soleri, from 1970 exhibition at Corcoran Gallery of Art, Washington, DC