| http://www.w3.org/ns/prov#value | - Further information: Roman Catholic Church and colonialism and Catholicism and the wars of religion Just before the Fall of Constantinople to the Muslim Ottoman Empire in 1453,[294] in an effort to combat the spread of Islam, Pope Nicholas V granted Portugal the right to subdue and even enslave Muslims, pagans and other unbelievers in the papal bull Dum Diversas (1452).
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