It grew into the ""island metropolis of eastern africa"" as the center of a mercantile empire whose tentacles stretched to the congo. it later was refashioned by the portuguese and then became a british colonial capital. to what city-state do these facts apply?

Zanzibar

Explanation:

The answer is Zanzibar city.

Zanzibar is a region is Tanzania. In 1498, Portuguese explorer, Vasco da Gama set for the expedition and marked for the beginning of the European influenced. In 1503, Zanzibar became a part of the Portuguese empire.

Before it grew as the island metropolis of Eastern Africa. But later on became a colony of the British.

Thus the answer is

"Zanzibar"

answer; i believe the correct answer is (117);