Which parts of Persepolis did Xerxes I complete after Darius I’s death?

After the death of his father, Darius I, Xerxes I continued the ambitious construction program at Persepolis. Regarding the projects initiated by his father, Xerxes I completed the following:

• Apadana: He finished the enameled-brick facing on the exterior of the audience hall.1
• Darius’ Palace: He completed the residential palace that his father had begun.1

In addition to finishing these structures, Xerxes I expanded the site by erecting his own palace, located southeast of his father’s, and a building often referred to by archaeologists as the harem, which may have served as his treasury. He also began construction on the Hall of a Hundred Columns, although he was only able to complete the paving and the base of the walls before his reign ended; the remaining work on that structure was later finished by Artaxerxes I.1