Like his Earth Room, Walter De Maria's Broken Kilometer -- an installation of 500 polished brass rods, each two meters in length, laid out in five columns of one hundred rods each across the floor of a West Broadway loft performs less as a work of art than a reflective conceptual space, an expansive gallery showroom dedicated to the contemplation of a single, simple installation, unchanged since its first exhibition in 1979. The piece was conceived as a counterpart to his earlier Vertical Earth Kilometer (1977), a single brass rod buried precisely a kilometer deep in the ground at Documenta in Kassel, Germany, and is supported, like the Earth Room, by the Dia Foundation.