The Metallurgical Laboratory or "Met Lab" was the code name for part of the World War II–era Manhattan Project – the Allied effort to develop the atomic bomb. It was part of the Metallurgical Project headed by Arthur H. Compton, a Nobel Prize laureate and Professor of Physics at the University of Chicago. The Metallurgical Laboratory produced the first controlled nuclear chain reaction in Chicago Pile-1, built at the University's old football stadium, Stagg Field. Its chemical section was the first to chemically isolate the first weighable amount of plutonium.