What was Xerxes' building program at Persepolis?

Xerxes was responsible for completing the monumental and building works of his father, Darius I at Persepolis. Taking inspiration from the various ethnic groups within the empire, he set about his own monumental and building works in the style of the Egyptians, Assyrians, Greeks and Babylonians. The Gate of All Nations, the Apadana (Audience Hall), western fortifications, 'Harem' and elaborately decorated staircases were all Xerxes' additions. This source-based homework task is designed for students of the NSW Ancient History Syllabus for the Australian Curriculum.
Higher School Certificate course
Historical Periods
Option D: Persia - Cyrus II to the death of Darius III
It can also be used as part of:
Historical Societies
Option D: Persian Society at the time of Darius and Xerxes
It can also be used as part of:
Historical Personalities:
The Near East: Xerxes