Answer:
Medieval Portugal comprised regions of considerable diversity. In the north the old aristocracy of Leonese descent owned large estates worked mainly by serfs. In the southern territory that had been reconquered from Muslim rule, there were many towns, often separated by districts almost barren and depopulated. Cistercian monks, who had reached Portugal by 1143, took the initiative in settling these areas; later kings such as Sancho I and Afonso III established concelhos (municipalities), granting them chartered privileges designed to attract settlers. Tax concessions were often given, and freedom was promised to serfs or to Christian captives after a year’s residence. In the south, however, the concelhos were burdened with defense duties. The cavaleiros-vilãos (villein knights) were obliged to horse and arm themselves; the peões, or less-substantial men, were required to serve as foot soldiers in defense of the country and perhaps also on a fossado (raid) into Muslim territory.
