An adobe building with a metal roof and a few partition walls more and more often takes the place of the ancient four-cornered house with a thatched roof and walls of branches plastered with clay. Small villages are sometimes exclusively inhabited by members of the same lineage, but the larger ones are divided into lineage quarters. The total population of a village varies considerably: a few thousands along the main streams, as a result of conurbation processes, sometimes well under a hundred in the countryside. Formerly, the capital used to be densely populated. The layout of the houses of the chief, his wives, and his dignitaries followed a definite checkered plan.
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