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But no city on the entire Swahili coast shone brighter than Kilwa Kisiwani. � Say that name slowly. Kilwa Kisiwani. The Island of Kilwa. � By the thirteen hundreds, Kilwa had become the most powerful city in all of East Africa. And the reason was gold. � Deep in the interior of Southern Africa, in what is now Zimbabwe, there was a kingdom producing massive quantities of gold. That gold needed to reach the world. And the only gateway ... was Kilwa. � Every ounce of gold leaving Great Zim