Between 1405 and 1433, Ming China sent out enormous armadas of ships into the Indian Ocean, commanded by the eunuch admiral Zheng He. The flagship and other largest treasure junks dwarfed European ships of that century; Christopher Columbus's flagship, the Santa Maria, was between 1/4 and 1/5 the size of Zheng He's. Incredibly, the largest ships in the fleet (called baoshan, or "treasure ships") were roughly 1/3 to 1/2 the displacement of modern American aircraft carriers.
This is an example of Christopher Columbus Map. This map is similar to the one he used to go on his voyage around the world. with a similar map like this he proved all that the earth was a sphere and not flat as many other explorers of his time believed.
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