The Tiber River Used to Flood Downtown Rome So Often They Built the Cloaca Maxima. It's Still in Use Today.

December 12, 2025
The Roman Empire
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The Roman Empire
Before Rome was an empire, it was a swamp. 🤢 The land between the famous seven hills was a marshy, disgusting mess. So how did it become the center of the world? A giant sewer. 🤯 ### 💧 The OG Sewer System: Cloaca Maxima Around 600 B.C., the Romans built the **Cloaca Maxima**, or "Greatest Sewer." It was one of the earliest sewer systems in the world, and it was a total game-changer. Its main job wasn't even to carry away human waste—it was to **drain the swampy land** so they could build the Roman Forum. - **Built by a King**: Ordered by King Tarquinius Priscus, Rome's fifth king. - **Massive Scale**: So big that wagons loaded with hay could drive through it. - **Still in Use**: Parts of it are **still in use today**, over 2,600 years later. 🤯 ### 💪 Engineering That Lasts The Cloaca Maxima was an engineering marvel. It was originally an open-air canal, but as the city grew, they covered it and connected it to all 11 of Rome's aqueducts. This created a constant flow of water that washed everything out into the Tiber River. It was so well-built that it survived: - Earthquakes 🌋 - Floods 🌊 - The fall of the Roman Empire 💀 It was the ultimate flood defense system, keeping the heart of Rome from turning back into a swamp every time the Tiber overflowed. The triple-arch outlet where it dumps into the river is **still there today**. ### 💩 So... Where Did the Poop Go? While the Cloaca Maxima did carry away some waste from public toilets and baths, most Romans didn't have a sewer connection. They used chamber pots and dumped them in the street. 😬 The sewer's main job was always **storm drainage**. It flushed all the rainwater, runoff, and whatever else was on the streets into the Tiber. It wasn't exactly hygienic by modern standards, but it was a revolutionary piece of infrastructure that made the city of Rome possible. Without the Cloaca Maxima, there would be no Roman Forum, no Colosseum, no empire. Just a swamp. 🤯 ### Sources & More Reading **1. Wikipedia - "Cloaca Maxima"**

The definitive source on the history, construction, and modern use of the Great Sewer.

Read at Wikipedia **2. Smithsonian Magazine - "How the Ancient Romans Went to the Bathroom"**

This article explains how the Cloaca Maxima connected to the public toilet system.

Read at Smithsonian Magazine **3. Livius.org - "Rome, Cloaca Maxima"**

Great photos and a clear explanation of the sewer's route through the city.

Read at Livius.org

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