3. Lisbon, Portugal

Lisbon was a pivotal hub in the early Atlantic slave trade, with Portuguese traders transporting countless enslaved Africans to Europe and the Americas. The immense profits from this trade helped fund the city’s iconic architecture, including its lavish palaces and ornate churches. In recent years, Lisbon has begun to confront this painful legacy, unveiling memorials and holding public discussions to honor the memory of those trafficked through its ports. For more on Lisbon’s role and contemporary reckoning, visit BBC News.