Outside the new Kirkland Museum of Fine & Decorative Art are five abstract sculptures that embody the last half-century of modern art in Colorado. The earliest piece is 1964's "Yin Yang," a two-part bronze fountain of interlocking organic shapes by Edgar Britton, the region's foremost mid-century modernist sculptor. There are two pieces by the state's dean of contemporary sculpture, Robert Mangold, one from 1980 in the fenced-in sculpture garden, and another done in 1982 that's mounted on the front of the building; both are tubular constructions from Mangold's "Tetrahedralhypersphere" series. These twentieth-century works are joined by two more recent sculptures: Near the historic Vance Kirkland Studio is "Celestial Echo," a bifurcated folded-plate form by Michael Clapper from 2004, and, marking the main entrance, "Procyon," by David Mazza, a tall and thin zigzagging piece from 2008. The greater Civic Center area already boasted the city's most significant public art; this new group puts it over the top.