Mitla is one of many well-preserved archeological sites in the
Oaxaca Valley, where the cold, dry climate has conserved sites as old as 10,000 years. This valley was settled by the Zapotec before the turn of the first millennium, who over the centuries developed a hierarchical society governed by elites. While the valley was relatively isolated, the Zapotec did have contacts with other
Mesoamerican peoples. This has been demonstrated by cultural, pottery and other influences that flowed back and forth between other peoples. By the time the Spanish arrived in the 16th century, the Mixtec had migrated into the area. The mixed Zapotec state had a population of more than 500,000. They had developed and used sophisticated construction techniques, a
writing system, two calendar systems, and sophisticated systems of agricultural cultivation. Their basic crops were
maize,
beans,
squash, and
chili peppers. These were dependent on their constructed irrigation systems and the use of terraces on mountain slopes in order to grow food for the mostly urban population. Nobles buried at Mitla were believed to be destined to become “cloud people,” who would intercede on behalf of the population below. Another early writer was Diego García de Palacio, a Spanish nautical engineer working in Mexico and Guatemala, whose account was dated in 1576. The stone blocks and remains were used as building materials for Spanish churches, including the Church of San Pablo, which was constructed on top of part of the ruins. The north side of the Cathedral of Oaxaca incorporates design features from Mitla to symbolize that the old culture was superseded by the new religious order. Since the 1980s, Mitla has been the site of further excavations, with important work conducted on the North Group. The colonial church was excavated around the start of the 21st century. For Mexico's
bicentennial celebrations in 2010,
INAH has been intensifying efforts to conserve the ancient ruins. ==Description of site==