Old Mexico most commonly refers to the country of Mexico. The term may also refer to: Places Modern designations Mexico Valley of Mexico region, referred to in ancient times as Anahuac Mexico City, in the State of Mexico Northern Mexico, including Baja California, Baja California Sur, Chihuahua, Coahuila, Durango, Nuevo León, Sinaloa, Sonora and Tamaulipas United States Parts of the United States are sometimes referred to as Old Mexico California, formerly The Californias New Mexico, formerly Nuevo México, itself sometimes referred to as “Old New Mexico” Pueblos, namesake of Nuevo México, their advanced trading network once connected with the Valley of Mexico, their network became part of El Camino Real Texas, formerly Spanish Texas and Coahuila y Tejas Historical designations Tenochtitlan, the altepetl of the Mexica people Aztec Empire, an empire formed in 1428 that lasted until 1521 In film In Old Mexico, 1938 American Western film Belle of Old Mexico, 1950 American film A Night in Old Mexico, 2013 Spanish-American film In music "The Seashores of Old Mexico", 1971 song written by Merle Haggard, recorded by Hank Snow Seashores of Old Mexico, 1987 studio album by Merle Haggard and Willie Nelson See also Mexico (disambiguation) New Mexico (disambiguation)