Question

What was the largest largest empire In the world ?

Answer 1

The British Empire was the largest empire the world has ever seen.

Thereafter The Mongol Empire was the largest contiguous empire the world has ever seen.

Answer 2

Mongol Empire
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Mongol Empire was the largest Empire in the world 
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1) This empire was spread over 10 Million Square Miles 

2) This empire had 115 Million People 

3) This empire was founded in 1206