The Mercado Abelardo Rodríguez , northeast of the Zócalo, became a canvas for a group of young international artists under the tutelage of Diego Rivera in the 1930s. Some of the most exuberant works, created by the American Greenwood sisters, cover the stairwell leading up to the community center, at the market’s northeast corner. On the 1st floor, Historia de México, by the Japanese artist Isama Noguchi, is a dynamic three-dimensional mural sculpted of cement and plaster that symbolizes the struggle against fascism. Other murals inside the market’s entry corridors are paeans to rural laborers and their traditions, though sadly some are fading from neglect.