Page "Pope Urban II" Paragraph 16

Roger's consort Adelaide brought settlers from the valley of the Po River to colonize eastern Sicily.

Roger as a secular ruler seemed a reliable ally, since he was merely a vassal of his kinsman the Count of Apulia, himself a vassal of Rome, so it seemed safe at the time for Urban to give him these extraordinary powers, which were later to lead to bitter confrontations with Roger I's Hohenstaufen heirs.