The eastern coast of Africa, south of Egypt, was at the center of a huge sea commerce between Rome and India through the Somali coast. Works, such as the Periplus of the Erythraean Sea and Ptolomey's "Geography", list a string of market places along this coast. Finds of Roman-era coins along the coast confirm the existence of this trade that extended to the area of modern day even Tanzania. "Geography" references the town of Rhapta as metropolis of a political entity called Azania. Archaeologists have not yet succeeded in identifying the location of Rhapta, though many believe it lies deeply buried in the silt of the delta of the Rufiji River.
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