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Moat

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A moat is a deep and wide ditch. It is dug around a castle, a town, or a building. These ditches provide a first line of defense.

Beaumaris Castle - geograph.org.uk - 4393765
Beaumaris Castle - geograph.org.uk - 4393765

Some moats are filled with water. Others are kept dry. In some places, these ditches grew into large lakes or dams. Later on, people used them for decoration or even as sewers.

Castle moat and watermill Steinfurt
Castle moat and watermill Steinfurt

Moats work by creating a difficult obstacle. A moat makes it hard to bring heavy siege weapons to a wall. These weapons include siege towers and battering rams.

Buhen3
Buhen3

If a moat is filled with water, it also stops mining. Mining is when people dig tunnels under a castle to make the walls fall. A water-filled ditch makes this very hard to do. Some moats have both dry and wet sections. These are called segmented moats.

People have used moats for a very long time. Early evidence was found at the fortress of Buhen in Nubia. There are also ancient moats in the ruins of Babylon.

Buhen3
Buhen3

In Southeast Asia, archaeologists found moats at sites like Noen U-Loke. These might have been for defense or for farming. In the Middle Ages, the word "moat" came from Old French. It was first used to describe the mound under a castle. Later, it meant the ring of earth dug around it.

Some moats in history were truly huge. The Walls of Benin in Nigeria were a massive system of ditches and dikes. This was the largest man-made structure in the world. It was even longer than the Great Wall of China.

Imperial Palace Tokyo Map
Imperial Palace Tokyo Map

These walls covered 6,500 square kilometers. They were built by the Edo people starting around 800. In Japan, castles often have three moats in circles. The Tokyo Imperial Palace still has active water moats today. People use them for fishing and rental boats.

Moats are still used in our modern world. Some buildings use dry moats for light and fresh air. The James Farley Post Office in New York City uses one.

Farley dry moat jeh
Farley dry moat jeh

Other moats are built for safety. The United States Embassy in London has a moat for security.

The American Embassy at Nine Elms - geograph.org.uk - 6945860
The American Embassy at Nine Elms - geograph.org.uk - 6945860

Even zoos use moats to keep animals away from people. This helps keep everyone safe while they watch the animals.

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🖼️ Images & Media (7)
File:Beaumaris Castle - geograph.org.uk - 4393765.jpg
Beaumaris Castle - geograph.org.uk - 4393765.jpg
File:Buhen3.jpg
Buhen3.jpg
File:Castle moat and watermill Steinfurt.jpg
Castle moat and watermill Steinfurt.jpg
File:NIMH - 2011 - 3706 - Aerial photograph of Naarden, The Netherlands.jpg
NIMH - 2011 - 3706 - Aerial photograph of...
File:Imperial Palace Tokyo Map.png
Imperial Palace Tokyo Map.png
File:Farley dry moat jeh.JPG
Farley dry moat jeh.JPG
File:The American Embassy at Nine Elms - geograph.org.uk - 6945860.jpg
The American Embassy at Nine Elms -...
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