Latest / The History of Portugal: The Small Nation That Built a Global Empire — Fexingo History / The Portuguese Empire's African Fortresses: Slaves, Gold, and Ivory
Transcript
- Lucas: So far on this show, we've talked a lot about Portugal's empire in Asia — the spice routes, the fortresses in India, Macau. But there's another side to the story that's just as important, and a lot darker. I'm talking about the Portuguese presence in West Africa. Luna: Right — the forts on the Gold Coast. I've heard of Elmina Castle. Lucas: Exactly. Elmina — or, in Portuguese, São Jorge da Mina — was the first major European fortification south of the Sahara. Built in 1482, just a few decades after the Portuguese began exploring the coast. It wasn't originally meant for slaves, either. The main prize was gold. Luna: Gold — that makes sense. West Africa was famous for it. Lucas: Right. The Portuguese called the region the Mina — 'the mine' — because they were tapping into the gold trade that had been going on for centuries, controlled by the Akan kingdoms inland. To access it, they needed a permanent base. So King João II sent a fleet of ten ships and a force of about six hundred soldiers and workers, commanded by Diogo de Azambuja, to build a fortress right on the coast, on land granted by the local chief, known to the Portuguese as Caramansa. Luna: So they negotiated with the locals first? Lucas: They did, though it was a tense negotiation. The chiefs were wary, and the Portuguese made a show of force — cannons, flags, a formal procession. But eventually, they struck a deal: the Portuguese got permission to build, and in return they offered gifts, trade goods, and an agreement to defend the area against rival African states. Within a few weeks, they had a stone fortress with a tower, a chapel, and a trading post — the feitoria. It was the prototype for all the forts that followed. Luna: What kind of goods did they trade for the gold? Lucas: A lot of things. Textiles from Portugal and North Africa, brass and copper manillas — those are bracelets used as currency — Venetian glass beads, and even horses. The horses were especially valuable, because the tsetse fly made it hard to keep them locally. In exchange, the Portuguese got gold dust, ivory, and later, slaves. The gold was shipped back to Lisbon, where the Casa da Mina — a royal trading house — managed the monopoly. At its peak, the Mina accounted for something like a quarter of Portugal's royal revenue. Luna: That's huge. But how did the slave trade come into it? Lucas: It crept in gradually. The Portuguese had been taking slaves from the Senegambia region since the 1440s, but on the Gold Coast, the initial focus was gold. Over time, though, as demand for labor in the sugar plantations of São Tomé and then Brazil skyrocketed, the slave trade became central. The forts became holding pens. Elmina itself was expanded in the 16th and 17th centuries, with dungeons built directly under the governor's quarters — places where thousands of enslaved men, women, and children were kept before being shipped across the Atlantic. Luna: That's a hard thing to sit with. Lucas: It is. And it's important to remember that the Portuguese didn't operate in a vacuum. They relied on African intermediaries — the Denkyira kingdom, for instance, controlled the interior routes and supplied captives from wars with neighboring states. The Asante, who later became a major power, also sold prisoners of war to the Portuguese. The forts were nodes in a system that local powers were very much part of, even though the Europeans held the sea and the fortifications. Luna: So it wasn't just Europeans imposing — it was a partnership, in a terrible way. Lucas: Exactly. And that makes it more complex. The Portuguese built other forts along the coast — Axim, Shama, Accra — and they also had trading posts in what's now Guinea-Bissau, at Cacheu and Bissau. These were smaller, but they all served the same basic purpose: to keep the trade flowing. Axim, for example, was built in 1515, and it was known for gold, but also for slaves. The Portuguese even had a fort in the kingdom of Benin, at a place called São João Baptista de Ajudá — that's in present-day Benin, and it was actually a Portuguese outpost until 1961, one of the last colonial holdouts. Luna: Wait — 1961? That late? Lucas: Yes. It was a tiny fort, just a few buildings, but it was a symbol. The Portuguese called it São João Baptista de Ajudá, and it was used for trade — mainly slaves, until the trade was outlawed in the 19th century. After that, it limped along as a trading post until the Republic of Dahomey took it over in 1961. By then, it was more of a curiosity than a real colony, but it shows how long the Portuguese clung to their African outposts. Luna: So the forts were really the backbone of the Atlantic trade. Lucas: They were. And they were expensive to maintain. The Casa da Mina had to pay for garrisons, artillery, and constant repairs from the tropical climate. But the profits from gold, and later from slaves, made it worthwhile for centuries. The fort at Elmina changed hands in 1637, when the Dutch captured it — that was during the Dutch-Portuguese War. But the Portuguese kept other forts, and they kept trading. The slave trade from Portuguese Africa to Brazil continued until 1850, and even after that, illegal slaving went on. Luna: And all of this connects back to what we talked about in the Brazil episode — the sugar plantations, the gold mines. Lucas: Exactly. The forts in Africa supplied the labor that built Brazil. Without those stone fortresses on the Gold Coast, the Portuguese empire in the Americas would have looked very different. And that's something we often overlook when we think about Portugal's global reach — the African keystone that held it all together. Luna: You know, when you hear about these forts, it's easy to think of them as ancient history. But the slave trade shaped the modern world in ways we're still living with. Lucas: Absolutely. And that's part of why it's worth understanding how these places actually worked. They weren't just castles — they were companies, prisons, marketplaces, and homes for hundreds of Portuguese soldiers, merchants, and African workers. And they left a deep mark on both Africa and the Americas. Luna: I'm curious about the everyday life inside a fort like Elmina. What was it like for the Portuguese stationed there? Lucas: Tough. The climate was brutal — heat, humidity, tropical diseases. Malaria and dysentery were constant threats. The garrisons were small, maybe a hundred soldiers, and they were often isolated for years. Supply ships came irregularly, so they relied on local food and trade. They also had to deal with African armies — the Denkyira, and later the Asante, could muster thousands of warriors. The Portuguese had cannons and ships, but on land, they were vulnerable. There were times when the forts were besieged, and the Portuguese had to negotiate or fight their way out. Luna: Did any Portuguese figure stand out in this story? Lucas: Diogo de Azambuja is the obvious one — he was the founder of Elmina, a knight of the Order of Christ who had fought in North Africa. He was tough, experienced, and ambitious. But there's also someone like João de Castilho, an architect who designed some of the fortifications. And later, in the 17th century, you have figures like Amador de Araújo, a governor of Elmina who defended it against Dutch attacks. But really, the most important people in this story are often nameless — the African traders, the enslaved people, the local chiefs who made the system work. Luna: Speaking of the people who made it work — I've been thinking about how much of this history relies on listener support to keep it ad-free and independent. Lucas: That's a good point. This show takes a lot of research, and we want to keep it accessible for everyone. If you find value in these conversations, you can support us at buy me a coffee dot com slash fexingo. Every bit helps, and it means we can keep digging into stories like this without any ads. Luna: Yeah, it's a small gesture that adds up. And we really appreciate it. Lucas: So, back to the forts — one detail I find fascinating is how the Portuguese managed trade. They had a system of licenses, similar to the cartaz system in Asia. Only Portuguese ships with a license could trade at the forts, and they had to pay duties to the Casa da Mina. This was meant to control the flow of gold and prevent smuggling. But it never worked perfectly. There was always illicit trade — Dutch, English, and French ships would show up, offering better prices, and local African states would play the Europeans off against each other. Luna: So the monopoly was more of an aspiration than a reality. Lucas: Exactly. The Portuguese crown claimed a monopoly, but in practice, the coast was porous. By the 17th century, the Dutch and English had their own forts — Cape Coast Castle, for instance, was built by the Swedish but taken over by the English. The Portuguese lost their dominance, but they stayed in the game. And their forts remained important until the abolition of the slave trade in the 19th century. Luna: It's strange to think of these massive stone castles sitting on a beach in Africa, centuries later. Lucas: They're still there. Elmina Castle is a UNESCO World Heritage site now, and it's a powerful place to visit. You can walk through the dungeons, see the door of no return, and feel the weight of history. It's a reminder that Portugal's small nation built not just a global empire of spice and gold, but also one of forced labor and human suffering. That duality is at the heart of this story. Luna: And I think that's what makes this show important — we don't shy away from the hard parts. Lucas: No, we don't. So next time you think of the Portuguese empire, remember the forts. They're the foundation that the whole Atlantic system was built on.