 The Institute of Hygiene (1925) in Popotla, Mexico, by José Villagrán García, was one of the first examples of this new national architecture.The studio designed by Juan O'Gorman in San Angel, Mexico City, for Diego Rivera and Frida Kahlo (1931–32) is a fine example of vanguard architecture built in Mexico.Mexico's first project of high-density, low-cost housing was the Centro Urbano Alemán (1947–49), Mexico City, by Mario Pani.