Which empire is considered one of the largest in history

The Mongol Empire is one of the largest empires

The Mongol Empire covered 9.15 million square miles of land - more than 16% of the earth's landmass. The empire had 110 million people between 1270 and 1309 more than 25% of the world's population

The Persian Empire was the largest Empire that had ever been established. The Persian Empire spanned from Egypt in the west to Turkey in the north, and through Mesopotamia to the Indus River in the east.