Latest / The History of Portugal: The Small Nation That Built a Global Empire — Fexingo History / Portugal's African Fortresses: The Slave Trade Engine
Transcript
- Lucas: So last time we talked about Arguim — Portugal's first feitoria in Africa, mostly about gold and gum arabic. But that was just the beginning. By the 1480s, the Portuguese crown was looking further down the coast, to a place the locals called Mina — the Gold Coast — where the real wealth was. Luna: Mina — that's modern-day Ghana, right? Lucas: Exactly. And in 1482, King João II sent a man named Diogo de Azambuja with a fleet of ten ships and about six hundred men — soldiers, stonemasons, carpenters — to build a fortress right on the coast. They called it São Jorge da Mina — Saint George of the Mine. Lucas: Now, this wasn't just a trading post. It was a full stone castle, with towers, a moat, and artillery. The locals — the Denkyira kingdom — initially allowed it because they wanted access to European goods, especially metal and cloth. But the Portuguese had a different agenda: they wanted to control the gold trade directly, cutting out the inland middlemen. Luna: And that's where the slave trade comes in, right? Because gold alone wasn't enough. Lucas: Right. The gold was huge — by the early 1500s, Elmina was exporting something like 24,000 ounces of gold a year. But the Portuguese soon realised that the most profitable commodity was people. They began trading slaves from the Gold Coast and later from Benin, the Congo, and Angola. And São Jorge da Mina became a key node in that network. Lucas: The fortress had a slave dungeon — a dark, cramped cell below sea level where captives were held before being loaded onto ships. The conditions were brutal. And the Portuguese built similar forts along the coast — São Sebastião de Xama at Shama, São António de Axim, and others. They created a chain of fortified trading posts that gave them a stranglehold on the coast. Luna: How did the local kingdoms react to these fortresses? I imagine they weren't just passive. Lucas: No, they weren't. The Denkyira initially saw the Portuguese as useful allies, but as the slave trade grew, tensions rose. The Portuguese often tried to play local powers against each other, supplying firearms to one group in exchange for slaves. Later, the Ashanti Empire, which rose in the late 17th century, became the dominant power inland, and they controlled the gold mines. The Ashanti had a complex relationship with the coastal forts — they traded with the Europeans but also fought to maintain their independence. Lucas: Life inside the fort was strange. There was a feitor — the factor, who managed trade. A capitão-mor — the captain-major, in charge of military. A chaplain said mass. And there were degredados — exiled convicts from Portugal, sent to serve as labourers or soldiers. It was a tiny, isolated Portuguese community surrounded by African kingdoms. Luna: And it wasn't just Portuguese there, was it? I've read about lançados — Portuguese traders who went native. Lucas: Exactly. Some Portuguese, especially lower-class men, would leave the fort and settle in African villages, marrying local women and trading independently. The crown officially frowned on this, but it was common. These lançados and their mixed-race children, called tangomãos, became important intermediaries in the slave trade. Lucas: Now, the Portuguese held São Jorge da Mina for over 150 years, but in 1637, the Dutch West India Company captured it. The Dutch had been eyeing Portuguese colonies for decades, and they took Elmina after a brief siege. It was a huge blow. Portugal never recovered its dominance on the Gold Coast. Luna: And these forts — they're still standing? I've seen pictures of Elmina Castle. Lucas: Yes, they're UNESCO World Heritage sites now. Tourists walk through those same dungeons, see the 'Door of No Return' — the gate captives passed through to the ships. It's a powerful, sobering reminder of what happened. The fortresses themselves are beautiful, but the history they represent is horrific. Luna: It's interesting you mention the beauty, because I sometimes think about how these structures — like Belém Tower in Lisbon — they're celebrated as architectural wonders, but they were built with the profits of this trade. Lucas: Absolutely. Portuguese historians used to call the slave trade 'the necessary commerce' — o comércio necessário — arguing it was essential to the empire. But it's a dark legacy. And you know, it's episodes like this that remind me why listener support matters. We don't have ads — we don't want to interrupt these conversations. A small group of listeners keeps us going through buy me a coffee dot com slash fexingo. And that's literally what makes it possible to cover these challenging topics. Luna: Yeah, it's not easy history, but it's important. And I'm glad we can do it without someone selling us something. Lucas: Right. So back to Elmina — after the Dutch takeover, the fort changed hands again. In the 19th century, the British took it, and it remained a colonial administrative centre until Ghana's independence in 1957. Today, it's a museum and a memorial. Lucas: One thing that often gets overlooked is that the Portuguese also built a fort at Shama — São Sebastião de Xama — which was smaller but strategically placed. That fort still stands too. And there were smaller feitorias that didn't have stone walls — just wooden palisades. The whole coast was dotted with these outposts. Luna: So how did the Portuguese administer all these forts from Lisbon? That seems like a huge logistical challenge. Lucas: They set up a dedicated institution: the Casa da Mina, based in Lisbon, which oversaw all trade and administration. Ships from the Carreira da Mina — the Mina run — sailed regularly, carrying goods like textiles, brass, and cowrie shells from the Indian Ocean, which were used as currency in West Africa. The crown took a cut of everything, of course. Lucas: But the system had flaws. Corruption was rampant — factors often skimmed profits. And the Portuguese crown was chronically underfunded, so they sometimes relied on private merchants to supply the forts in exchange for trade privileges. Luna: It sounds like a very human empire — ambitious but messy. Lucas: Exactly. And that messiness meant that when the Dutch arrived with better ships and more aggressive tactics, the Portuguese couldn't hold on. The loss of Elmina in 1637 was the beginning of the end for Portuguese West Africa. They kept Angola and Mozambique, but the Gold Coast was gone. Lucas: Still, for over a century, São Jorge da Mina was the most important European fortress in sub-Saharan Africa. It was a proto-colonial settlement — a stone and mortar assertion of power on a continent where Europeans had previously only traded from ships or beach camps. Luna: And that shift — from trading at sea to building permanent forts — it changed everything, didn't it? Lucas: It did. It gave Europeans a foothold, allowed them to project power inland, and set the pattern for later colonialism. The slave trade wouldn't have reached the scale it did without these fortified bases. So when we look at those pretty postcards of Elmina Castle, we have to remember the thousands of people who passed through its dungeons, and the empire that built it. Luna: It's a heavy topic, but one worth sitting with. Lucas: Definitely. Next time, maybe we'll talk about what happened after — the Portuguese in Angola and Brazil, and how the slave trade connected those colonies. But for now, I think we've covered a lot.