The Hacienda de los Martinez is one of the few northern New Mexico style, late Spanish Colonial period, "Great Houses" remaining in the American Southwest. Built in 1804 by Severino Martin (later changed to Martinez), this fortress-like building with massive adobe walls became an important trade center for the northern boundary of the Spanish Empire.It was built with stout walls surrounding courtyards and was designed to be a refuge against Comanche attacks. The Hacienda was the final terminus for the Camino Real which connected northern New Mexico to Mexico City. The Hacienda also was the headquarters for an extensive ranching and farming operation. The self-guided tour takes in the living quarters, granary and blacksmiths shop.