Plan of Babel Canyon Arcology city structure design by Paolo Soleri, from 1970 exhibit at Corcoran Gallery of Art, Washington, DC

Photograph of swimming pool and concrete canopy, with view of Student Apse in background, at Cosanti in Paradise Valley, Arizona

Photograph of swimming pool and concrete canopy at Cosanti in Paradise Valley, Arizona

Model of Hexahedron Arcology design by Paolo Soleri

Model of Hexahedron Arcology design by Paolo Soleri

Basic concept model of Two Suns Arcology design by Paolo Soleri

Plastic model of Arcube Arcology design by Paolo Soleri

Drawing of Arcology design by Paolo Soleri

Photograph showing models of Hexahedron and Babel Canyon Arcology designs by Paolo Soleri

Photograph showing unidentified person and the poles supporting the concrete canopy above the swimming pool at Cosanti in Paradise Valley, Arizona