A fascination with prehistory links Mr. Heizer’s Stonehenge-like “City” to these sculptural objects, though his architectural forms are fastidiously hard-edged in comparison with the flint-facetted tools. But for all his insistence on freeing himself from European precedents, to explore instead an American sense of wide open space and anti-individual scale, Mr. Heizer’s prehistoric sensibility has a long modernist precedent with deep roots in European culture.