The residential neighborhood contains adobe and brick buildings in Spanish-Mexican, Anglo-American and Eclectic architectural styles. Named for the Spanish-built Presidio de San Augustín del Tucson built in 1775, El Presidio is one of the nation`s oldest inhabited sites. The district incorporates a prehistoric Hohokam Indian site (c. 700-900 A.D.) as well as most of the original presidio or fort. The El Presidio Historic District reflects Tucson’s development from an 18th-century walled compound to its emergence as a modern settlement. Established in 1775 by Colonel Hugo O`Connor of the Spanish Army you may follow the walkway in downtown that leads into a time line of Tucson. Locate El Presidio Park and find interesting plaques explaining this area`s significance throughout the city`s history. Presidio Park interprets the history with signs and there is a small museum with some artifacts. This site represents a very unique place in Arizona.