What was the purpose of the Acropolis rebuild?

Answer 1

An acropolis was a high point in a Greek city which was usually fortified as a refuge in time of invasion.

If it is the Acropolis in Athens you are querying, it was rebuilt several times. It held temples to the gods and the city treasury. Original wooden buildings were rebuilt with stone temples in the 7th Century. When the Persians invaded and captured and held the city in 480 and 479 BCE, they destroyed the temples and broke up the statues of the gods as a reprisal for Athens' participation in a burning of the Persian provincial capital of Sardis and destruction of the gods two decades earlier. The Athenians rebuilt the temples and refortified the Acropolis.

The Acropolis temples were rebuilt on a grander scale in the 440s-430s BCE - the remains are still there today. They could afford to do this rebuild because Athens diverted the funds it collected for the anti-Persian League defence to glorifying its own city.

The Acropolis buildings were well built and might have been in good condition if looked after. However during the Venetian expedition against Turkey in the 16th Century, a French artillery officer, to show off his marksmanship, lobbed a shell through the roof of the Parthenon. It landed on a Turkish gunpowder store in the building and collapsed the roof as we see it today.

Neglect has seen ongoing deterioration of the Acropolis buildings to today's deplorable state. A rebuilding attempt a century ago was a disaster as the iron interlocks put in to hold together rebuilt buildings rusted and expanded and exploded the stones. Acid rain eroded the statues while Greece debated how to go about doing something about it. No significant rebuild has taken place and the buildings are given minimum maintenance to keep them viable as tourist attractions.