Final answer:
The Roman Empire was founded in 27 BCE, the Ottoman Empire had its capital at Istanbul, the British Empire was the largest empire in history, and the Mongol Empire was ruled by Genghis Khan.
Step-by-step explanation:
Match the name of the empire with an important fact:
- Roman Empire: Founded in 27 BCE
- Ottoman Empire: Capital at Istanbul
- British Empire: Largest empire in history
- Mongol Empire: Ruled by Genghis Khan