The Îles de Los form an island group off the coast of Conakry, within waters long used by coastal communities for fishing, trade, settlement, and navigation. European mariners recorded the islands from the early modern period and valued their sheltered anchorages. Their history cannot begin with Europeans, however, because the surrounding coast belonged to African societies with established political and commercial networks.

Portuguese, British, French, and other traders visited the region, exchanging goods within Atlantic commerce that included the trafficking of enslaved people. Ships used islands for water, provisions, repairs, negotiation, and holding cargo. The precise role of individual islands changed over time, and surviving evidence must be handled carefully rather than assuming every anchorage functioned identically as a slave-trading station.

British influence became particularly strong in the nineteenth century through connections with Sierra Leone and antislavery patrols, missionaries, merchants, and local rulers. The islands were transferred to French control in 1904 as colonial boundaries around Guinea and Sierra Leone were formalized. Kassa and neighboring islands were then drawn more directly into the economy and administration of French Guinea.

Bauxite quarrying, fishing, agriculture, shipping, and the growth of nearby Conakry transformed the islands during the twentieth century. Extraction altered landforms and brought employment, migration, infrastructure, and environmental damage. Independence in 1958 changed political authority but did not end the strategic and economic importance of the archipelago or its close relationship with the capital.

Historical research must combine African oral traditions, archaeology, shipping records, colonial archives, and environmental study. Coastal erosion, industrial activity, development, and rising seas threaten sites that may include settlements, graves, trading places, and maritime remains. Preservation should support island communities and avoid reducing their complex history to picturesque beaches or a single colonial narrative, while openly addressing connections to slavery and resource extraction. The wider landscape is essential to this history. Roads, waterways, fields, working districts, cemeteries, religious institutions, and modest housing reveal connections that monumental buildings alone cannot explain. Oral history can preserve memories of places whose physical fabric has disappeared, while archives and archaeology help test later tradition. Effective conservation must involve residents in decisions about repair, development, and interpretation, since displacement can preserve façades while destroying community continuity. Climate change adds new risks through storms, flooding, erosion, heat, and salt. Mapping vulnerable areas, maintaining traditional skills, and keeping historic property in productive use can protect both material evidence and the living knowledge attached to it. This broader evidence keeps the site's history connected to the people who created, used, and remembered it.