This is the formal name given to the giant walled section of great zimbabwe in africa

They are known as the Hill Complex, the Valley Complex and the Great Enclosure. The Hill Complex is the oldest, and was occupied from the ninth to thirteenth centuries. The Great Enclosure was occupied from the thirteenth to fifteenth centuries, and the Valley Complex from the fourteenth to sixteenth centuries.

Explanation:

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.