Over the course of the 12th and 13th centuries, there unrolled a steady process of the impoverishment of Mozarab cultivators, as more and more land came under control of magnates and ecclesiastical corporations. The latter, under the influence of the Benedictine bishop of Cluny Bernard, and the Archbishop of Toledo Rodrigo Jiménez de Rada, who was himself the principal buyer of Mozarab property in the early 13th century fomented a segregationalist policy under the cloak of religious nationalism. Jiménez de Rada's bias is symbolized in his coining of the semi-erudite etymology of the word Mozarab from "Mixti Arabi", connoting the contamination of this group by overexposure to infidel customs, if not by migration.