"The South had more immigrants in large cities" was not a reason for the growing division between North and South after 1820, since the North had far more immigrants.
Answer:
Athens
The Parthenon is the centrepiece of a 5th-century-BCE building campaign on the Acropolis in Athens. Constructed during the High Classical period, it is generally considered to be the culmination of the development of the Doric order, the simplest of the three Classical Greek architectural orders
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