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14 once-great lost cities

Carthage

Photo: Nataliya Hora/Shutterstock

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Carthage

Ancient Carthage, found in modern-day Tunisia, was home to one of the greatest trading empires in the history of the Mediterranean region. The city dominated the seas for centuries, but was also renowned for its politics. In fact, Greek philosopher Aristotle considered the city to have one of the best governing institutions in the world.