Abstract In the late nineteenth century, Western Powers launched military campaigns in sub-Saharan Africa resulting in the colonization of vast territories and the spoliation of cultural property. To justify the conquest, they asserted the supremacy of Western culture and disregarded principles of international law in their dealings with African states, communities, and individuals. This article examines colonialist legal justifications such as the denial of statehood of pre-colonial sub-Saharan African societies, the notion that conquest and spoliation were justifiable, and the belief that African legal systems lacked concepts of property. The article details why these arguments contradict well-established nineteenth-century legal principles, particularly state sovereignty and private property, which together form the conceptual basis for the prohibition of spoliation. The universal nature of those principles allows for the nondiscriminatory application and interpretation of historical law and consequently the protection of African pre-colonial states and private as well as public cultural property.