The British Empire was the largest empire in history, spanning over 13 million square miles at its peak.

Augustus Caesar, also known as Octavian, was the first emperor of the Roman Empire, ruling from 27 BC to 14 AD.

Genghis Khan founded the Mongol Empire in the 13th century, which at its peak spanned over 16 million square miles.

Constantinople, also known as Byzantium, was the capital of the Byzantine Empire from the 4th century AD to the 15th century AD.

The Chinese Empire, also known as the Middle Kingdom, was one of the longest-lasting empires in history, spanning over 4,000 years.

Nicholas II was the last emperor of the Russian Empire, ruling from 1894 to 1917.

The Umayyad Caliphate was a Muslim empire that ruled over much of the Middle East and North Africa from the 7th to the 8th century AD.

The Kangxi Emperor was the first emperor of the Qing Dynasty, ruling from 1661 to 1722.

The Holy Roman Empire was a collection of states in Central Europe that existed from the 10th to the 19th century AD.

Mehmed VI was the last emperor of the Ottoman Empire, ruling from 1918 to 1922.

The Japanese Empire was a powerful empire in East Asia from the 19th to the 20th century AD.

Babur was the first emperor of the Mughal Empire, ruling from 1526 to 1530.

The Incan Empire was a powerful empire in South America from the 13th to the 16th century AD.

Constantine XI Palaiologos was the last emperor of the Byzantine Empire, ruling from 1449 to 1453.

The Russian Empire was a powerful empire in Eastern Europe and Asia from the 18th to the 20th century AD.