This district considered to be the Mexican-American side of Tucson, has been called Barrio Viejo or Barrio Libre since its Mexican inhabitants were more or less free to follow their own laws in the old days. This of course has now changed but the area preserves its distinctly Mexican appearance with the flat-roofed adobe houses and roofs made from saguaro ribs and packed dirt. Some of Tucson`s oldest structures can be found here and many of them well restored. Since most have been converted into private homes or offices a visit would be confined to the exteriors. The neighborhood showcases the brightly painted adobe houses dating back to the mid 1800s. Some are quite pretty and photogenic.