Which is the largest contiguous land empire ever existed?*1 pointOttoman EmpireMongol EmpireRussian EmpirePersian Empire

The largest contiguous land empire in history is the Mongol Empire.

The Mongol Empire, founded by Genghis Khan in the early 13th century, expanded rapidly and at its height covered around 33 million square kilometers (approximately 12.74 million square miles), stretching from Eastern Europe across Asia to the Sea of Japan. This vast territory was maintained under a single political entity, making it the largest contiguous empire in history.

In contrast, while the Ottoman, Russian, and Persian empires were indeed vast and significant, they did not maintain the same level of contiguous land area as the Mongol Empire. The Mongol Empire's ability to conquer and administer such a vast expanse of land in a relatively short time period is a unique feat in the history of empires.