The narrator referred to Nubia as a Lost Kingdom because it had been overshadowed by the lower Nile civilization.
It should be noted that Nuban civilization is among the oldest civilization in the world. They were agriculturist and exported gold.
The person that founded the Nubian Civilization is the Napatan. Some of their achievements include the fact that they built palace, pyramids, and temples.
The downfall of the Nubian Civilization was due to desertification and loss of trade routes.
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