Shadows of the Atlantic Slave Trade in Spain and Portugal: A Study Through Teacher Training and Museum Heritage

The Atlantic slave trade was one of the most significant and violent processes in global history, and the Iberian empires played a central role in its development. Yet in Spain and Portugal, the historical and public memory of slavery remains fragmented, producing silences that contrast with its historical magnitude. This study examines these silences through two complementary lenses: the academic preparation of future history teachers and the heritage narratives presented in Iberian museums, adopting a mixed-methods design. A total of 138 pre-service teachers from eight Spanish and Portuguese universities completed a questionnaire providing quantitative data to assess how the Atlantic slave trade was addressed in their university training and which didactic and heritage resources they consider most appropriate for teaching it. In parallel, exhibitions and institutional discourses were analysed in seven national and regional museums related to America, colonisation or maritime expansion, drawing on qualitative data from written interviews with museum professionals. The findings reveal limited curricular attention to the Atlantic slave trade, uneven valuation of heritage resources, and highly variable museum narratives. These results highlight the need for coordinated educational and heritage strategies that strengthen historical understanding, support democratic and intercultural competencies, and contribute to a more inclusive and critically informed public memory.