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

Photograph of amphitheater designed by Paolo Soleri at the Santa Fe Indian School (previously named the Institute of American Indian Arts) in Santa Fe, New Mexico

Photograph of amphitheater designed by Paolo Soleri at the Santa Fe Indian School (previously named the Institute of American Indian Arts) in Santa Fe, New Mexico

Photograph of amphitheater designed by Paolo Soleri at the Santa Fe Indian School (previously named the Institute of American Indian Arts) in Santa Fe, New Mexico

Photograph of amphitheater designed by Paolo Soleri at the Santa Fe Indian School (previously named the Institute of American Indian Arts) in Santa Fe, New Mexico

Photograph of amphitheater, designed by Paolo Soleri, at the Santa Fe Indian School (previously named the Institute of American Indian Arts) in Santa Fe, New Mexico

Photograph of amphitheater, designed by Paolo Soleri, at the Santa Fe Indian School (previously named the Institute of American Indian Arts) in Santa Fe, New Mexico

Photograph of amphitheater, designed by Paolo Soleri, under construction at the Santa Fe Indian School (previously named the Institute of American Indian Arts) in Santa Fe, New Mexico

Photograph of amphitheater, designed by Paolo Soleri, at the Santa Fe Indian School (previously named the Institute of American Indian Arts) in Santa Fe, New Mexico, showing architectural details

Photograph of amphitheater, designed by Paolo Soleri, at the Santa Fe Indian School (previously named the Institute of American Indian Arts) in Santa Fe, New Mexico