in 1940 and worked until his death, leaving a number of unfinished works. His work was exhibited in various locations in Mexico as well as abroad. Most of his individual exhibitions were in Mexico City, with others in the United States and Brazil. He had his first exhibition in Guadalajara in 1944, organized by María Asúnsolo, a known supporter of the arts. In break into the Mexico City market, Martínez compiled a series of oils, tempera and drawings for the Galería de Arte Mexicano directed by Inés Amor. He then showed with this gallery frequently in his early career (1944, 1945, 1947, 1950, 1951, 1952, 1954, 1955, 1958, 1964), the Colorado Springs Fine Arts Center (1948-1949) along with the Galería de Arte Mexicano in Mexico City (1956), The Contemporaries in New York (1959, 1960, 1961, 1964), the Phoenix Art Museum (1966), the Sindin Gallery in New York (1976) and Club de Banqueros de México in Mexico City (2000), as well as prestigious showings at the Museo de Arte Moderno in 1969 and 1974 and the Palacio de Bellas Artes in 1984 and 1994. The 1994 show was an anthology of is work as well as a national event to honor the artist. His work featured prominently in collective exhibitions of Mexican art in countries such as the United States, Guatemala, Sweden, Peru, Great Britain, Argentina, Japan, Italy, the Netherlands, France, Denmark, Poland and El Salvador. One major collective exhibition was “Masterpieces of Mexican Art” which toured the United States and Europe from 1961 to 1963. His works can be found in public and private collections around the world. In Mexico, his works are part of the collections of the Museo de Arte Moderno, the Bancomer Foundation, the Galería de Arte Moderno and the Universidad Nacional Autónoma de México. One collection abroad with a work is that of the Vatican, given as a gift to Pope Paul IV by then Mexican president Echeverría. In addition to painting, Martínez illustrated books, mostly by writer friends. These include Muerte sin fin by José Gorostiza, Junta de sombras by Alfonso Reyes, Poemas mexicanos by Francisco Giner de los Ríos, Epigrama Americanos by Enrique Díez Canedo, Juego de pobres by José Bonifaz Nuño and Pedro Paramo by Juan Rulfo . His work has been published in thirty four books both before and after his death. He created the sets for the dance piece Xochipili Macuilxoxohitl