Latest / The History of Portugal: The Small Nation That Built a Global Empire — Fexingo History / Portugal's 1755 Lisbon Earthquake: The Day the Empire Trembled
Transcript
- Lucas: So we've talked a lot about Portugal's rise—the caravels, the feitorias, the battles that built the empire. But today I want to talk about a day that nearly undid it all: November 1, 1755. Luna: The Lisbon earthquake. Lucas: Exactly. All Saints' Day, and the city was packed with people in churches. At about 9:40 in the morning, the ground started shaking. Three distinct shocks, each one worse than the last. Modern estimates put it at magnitude 8.5 to 9.0. Luna: That's terrifying. And it wasn't just the shaking. Lucas: No. The earthquake triggered a tsunami—waves up to 12 meters high swept into the Tagus River and flooded the lower city. Then fires broke out from overturned candles and hearths, and they burned for days. By the time it was over, somewhere between 30,000 and 50,000 people were dead, and about 85% of Lisbon's buildings were destroyed. Luna: That's catastrophic. What did people think caused it? Divine punishment? Lucas: Many did. The earthquake happened on a holy day, so a lot of clergy said it was God's wrath against the city's sins. But there were also voices of reason. The Marquis of Pombal, who was the king's chief minister, famously asked the parishes to send in questionnaires about the earthquake's effects—where it was strongest, how long it lasted, what damage occurred. That was one of the first systematic scientific surveys of an earthquake. Luna: So he was already thinking like a modern disaster manager. Lucas: Exactly. Pombal's response was remarkably practical. He famously said, 'What are we to do? Bury the dead and feed the living.' He organized relief efforts, prevented looting by hanging looters on the spot, and immediately began planning the reconstruction. And he used the disaster to centralize power, weaken the old nobility, and push through reforms. Luna: What about the reconstruction itself? I've heard of the Baixa Pombalina. Lucas: Right. The downtown area, called the Baixa, was rebuilt on a grid plan with wide streets and uniform buildings. And they incorporated early seismic engineering: a flexible wooden frame called the gaiola pombalina—literally 'Pombal's cage'—that was designed to sway with tremors without collapsing. It's considered a precursor to modern earthquake-resistant construction. Luna: So out of disaster came innovation. Lucas: Absolutely. But the earthquake also had huge intellectual consequences. Voltaire wrote about it in Candide, using it to satirize the idea that 'all is for the best in the best of all possible worlds.' Kant wrote three essays on the earthquake, proposing theories about underground gases—he was wrong about the cause, but it shows how the event spurred scientific thinking across Europe. Luna: And it shook faith too, I imagine. Lucas: Yes. The fact that it happened on All Saints' Day, when churches were full, made many people question divine providence. It weakened the Inquisition's authority, because they couldn't explain why the faithful died alongside the sinners. Pombal used that to reduce the Inquisition's power. Luna: So in a way, the earthquake helped modernize Portugal. Lucas: In some ways, yes. The reconstruction created a more rational city. But the economic cost was staggering. Portugal was still an empire, relying on gold from Brazil and trade with Asia. The earthquake disrupted that, and the rebuilding drained the treasury. Some historians argue it was the beginning of Portugal's relative decline—the empire never fully recovered its former prosperity. Luna: It's like the disaster hit at the worst possible time. Lucas: Exactly. And here's something we've touched on before: we try to keep this show ad-free because we think history should be accessible without interruptions. If you want to support that—and help us keep going—you can find us at buy me a coffee dot com slash fexingo. No pressure, but it helps. Luna: Yeah, that's the link. And it's because of listeners like that that we can spend time on these deep dives. Lucas: Right. Anyway, back to Lisbon. One lasting symbol of the earthquake is the Armillary Sphere—an old navigation instrument that became a symbol of Portugal. After the quake, it was adopted as a national emblem, representing resilience and the country's global reach. You see it on the Portuguese flag today. Luna: So from destruction came a new identity. Lucas: In a way. The earthquake forced Portugal to confront its vulnerabilities but also demonstrated its capacity for rational recovery. It's a story of disaster, yes, but also of human ingenuity and resilience.