The Sierra Otomí live in Indian villages ranging in population from 500 to 1,500 persons, in smaller Indian hamlets, and in towns often politically controlled by a non-Indian elite. The villages and hamlets are dispersed, irregularly organized settlements with fields between the houses. Traditional dwellings are small, averaging 5 by 9 meters. The construction varies with climate: at the higher elevations, vertical or horizontal wooden walls and wood-shingled roofs prevail; at the lower elevations, vertical pole walls with thatched roofs are common. Stone masonry is often used for public or religious buildings. Modern houses are being built of concrete blocks, manufactured roofing, and reinforced concrete. The main agricultural structure is a crib for storing dried maize on the cob.