Santiago Tianguistenco, often just simply called Tianguistenco, is a city and municipality located in Mexico State about thirty km south of the state capital of Toluca. It is located in the southwest part of the Valley of Toluca at the edge of the Ajusco mountain range that separates it from Mexico City. The name Tianguistenco (Tyanguistengko) is from Nahuatl and means “at the edge of the tianguis,” which is a traditional Aztec market. (Santiago comes from the town’s early Spanish name of “Villa de Santiago.”) The section of the city where the industrial park is still bears this name. Historically, the area was known as having one of the richest and best-stocked markets in the Toluca Valley.