Mario Orozco Rivera Mexican, B. 1930 - Mario Orozco Rivera is one of the true Mexican Masters, a noted member of the internationally famous Mexican muralist group including Diego Rivera and David Siqueiros. Born in 1930, Orozco Rivera worked closely with David Siqueiros, and the style is distinct. One of the salons at the famous Polyforum Museum in Mexico City bears this Master's name. His work is included in many permanent museum collections.